51020525015 has 4 divisors (see below), whose sum is σ = 61224630024. Its totient is φ = 40816420008.

The previous prime is 51020525011. The next prime is 51020525027. The reversal of 51020525015 is 51052502015.

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

It is a cyclic number.

It is not a de Polignac number, because 51020525015 - 2² = 51020525011 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 (51020525011) 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, 5102052497 + ... + 5102052506.

It is an arithmetic number, because the mean of its divisors is an integer number (15306157506).

Almost surely, 2^51020525015 is an apocalyptic number.

51020525015 is a deficient number, since it is larger than the sum of its proper divisors (10204105009).

51020525015 is a wasteful number, since it uses less digits than its factorization.

51020525015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10204105008.

The product of its (nonzero) digits is 2500, while the sum is 26.

The spelling of 51020525015 in words is "fifty-one billion, twenty million, five hundred twenty-five thousand, fifteen".