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80030631 = 326676877
BaseRepresentation
bin1001100010100…
…10101110100111
312120120222101110
410301102232213
5130441440011
611535200103
71661151312
oct461225647
9176528343
1080030631
11411a221a
1222976033
1313771305
14a8b3979
15705cba6
hex4c52ba7

80030631 has 4 divisors (see below), whose sum is σ = 106707512. Its totient is φ = 53353752.

The previous prime is 80030581. The next prime is 80030653. The reversal of 80030631 is 13603008.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 80030631 - 26 = 80030567 is a prime.

It is a super-2 number, since 2×800306312 = 12809803796516322, 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 = 80030598 and 80030607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80030131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13338436 + ... + 13338441.

It is an arithmetic number, because the mean of its divisors is an integer number (26676878).

Almost surely, 280030631 is an apocalyptic number.

80030631 is a deficient number, since it is larger than the sum of its proper divisors (26676881).

80030631 is a wasteful number, since it uses less digits than its factorization.

80030631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26676880.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 80030631 is about 8945.9840710790. The cubic root of 80030631 is about 430.9419247299.

Adding to 80030631 its reverse (13603008), we get a palindrome (93633639).

The spelling of 80030631 in words is "eighty million, thirty thousand, six hundred thirty-one".

Divisors: 1 3 26676877 80030631