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2405420231 = 31697111131
BaseRepresentation
bin1000111101011111…
…1100110011000111
320012122020000020012
42033113330303013
514411241421411
61034404300435
7113415506654
oct21727746307
96178200205
102405420231
111024884905
125716a171b
132c4465aa6
1418b670c2b
15e129718b
hex8f5fccc7

2405420231 has 8 divisors (see below), whose sum is σ = 2483593728. Its totient is φ = 2327283000.

The previous prime is 2405420161. The next prime is 2405420233. The reversal of 2405420231 is 1320245042.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2405420231 - 210 = 2405419207 is a prime.

It is a super-2 number, since 2×24054202312 = 11572092975408186722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2405420197 and 2405420206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2405420233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210536 + ... + 221666.

It is an arithmetic number, because the mean of its divisors is an integer number (310449216).

Almost surely, 22405420231 is an apocalyptic number.

2405420231 is a deficient number, since it is larger than the sum of its proper divisors (78173497).

2405420231 is a wasteful number, since it uses less digits than its factorization.

2405420231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18133.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2405420231 is about 49045.0836577939. The cubic root of 2405420231 is about 1339.8730538016.

Adding to 2405420231 its reverse (1320245042), we get a palindrome (3725665273).

The spelling of 2405420231 in words is "two billion, four hundred five million, four hundred twenty thousand, two hundred thirty-one".

Divisors: 1 31 6971 11131 216101 345061 77594201 2405420231