551515013 has 4 divisors (see below), whose sum is σ = 630302880. Its totient is φ = 472727148.

The previous prime is 551515001. The next prime is 551515043. The reversal of 551515013 is 310515155.

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, and also an emirpimes, since its reverse is a distinct semiprime: 310515155 = 5 ⋅62103031.

It is a cyclic number.

It is not a de Polignac number, because 551515013 - 2⁸ = 551514757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551515043) 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, 39393923 + ... + 39393936.

It is an arithmetic number, because the mean of its divisors is an integer number (157575720).

Almost surely, 2^551515013 is an apocalyptic number.

It is an amenable number.

551515013 is a deficient number, since it is larger than the sum of its proper divisors (78787867).

551515013 is an equidigital number, since it uses as much as digits as its factorization.

551515013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78787866.

The product of its (nonzero) digits is 1875, while the sum is 26.

The square root of 551515013 is about 23484.3567721153. The cubic root of 551515013 is about 820.0728732579.

The spelling of 551515013 in words is "five hundred fifty-one million, five hundred fifteen thousand, thirteen".