130815517 has 4 divisors (see below), whose sum is σ = 149503456. Its totient is φ = 112127580.

The previous prime is 130815481. The next prime is 130815539. The reversal of 130815517 is 715518031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 130815517 - 2¹⁵ = 130782749 is a prime.

It is a super-2 number, since 2×130815517² = 34225398975954578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130815577) 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, 9343959 + ... + 9343972.

It is an arithmetic number, because the mean of its divisors is an integer number (37375864).

Almost surely, 2^130815517 is an apocalyptic number.

It is an amenable number.

130815517 is a deficient number, since it is larger than the sum of its proper divisors (18687939).

130815517 is an equidigital number, since it uses as much as digits as its factorization.

130815517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18687938.

The product of its (nonzero) digits is 4200, while the sum is 31.

The square root of 130815517 is about 11437.4611256170. The cubic root of 130815517 is about 507.6367877698.

The spelling of 130815517 in words is "one hundred thirty million, eight hundred fifteen thousand, five hundred seventeen".