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130020311 = 2329194933
BaseRepresentation
bin1111011111111…
…11001111010111
3100001122201100002
413233333033113
5231241122221
620522441515
73136103651
oct757771727
9301581302
10130020311
1167436203
123766329b
1320c24ac5
14133a76d1
15b63480b
hex7bff3d7

130020311 has 8 divisors (see below), whose sum is σ = 140352480. Its totient is φ = 120078112.

The previous prime is 130020281. The next prime is 130020313. The reversal of 130020311 is 113020031.

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 130020311 - 210 = 130019287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130020292 and 130020301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130020313) 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, 96800 + ... + 98133.

It is an arithmetic number, because the mean of its divisors is an integer number (17544060).

Almost surely, 2130020311 is an apocalyptic number.

130020311 is a deficient number, since it is larger than the sum of its proper divisors (10332169).

130020311 is a wasteful number, since it uses less digits than its factorization.

130020311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194985.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 130020311 is about 11402.6449124754. The cubic root of 130020311 is about 506.6060829473.

Adding to 130020311 its reverse (113020031), we get a palindrome (243040342).

The spelling of 130020311 in words is "one hundred thirty million, twenty thousand, three hundred eleven".

Divisors: 1 23 29 667 194933 4483459 5653057 130020311