51515011000 has 32 divisors (see below), whose sum is σ = 120545128080. Its totient is φ = 20606004000.

The previous prime is 51515010947. The next prime is 51515011033. The reversal of 51515011000 is 11051515.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25756506 + ... + 25758505.

Almost surely, 2^51515011000 is an apocalyptic number.

51515011000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51515011000 is an abundant number, since it is smaller than the sum of its proper divisors (69030117080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51515011000 is a wasteful number, since it uses less digits than its factorization.

51515011000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51515032 (or 51515018 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 19.

Adding to 51515011000 its reverse (11051515), we get a palindrome (51526062515).

The spelling of 51515011000 in words is "fifty-one billion, five hundred fifteen million, eleven thousand".