51512412615 has 8 divisors (see below), whose sum is σ = 82419860208. Its totient is φ = 27473286720.

The previous prime is 51512412583. The next prime is 51512412629. The reversal of 51512412615 is 51621421515.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51512412615 - 2⁵ = 51512412583 is a prime.

It is a super-2 number, since 2×51512412615² (a number of 22 digits) contains 22 as substring.

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, 1717080406 + ... + 1717080435.

It is an arithmetic number, because the mean of its divisors is an integer number (10302482526).

Almost surely, 2^51512412615 is an apocalyptic number.

51512412615 is a deficient number, since it is larger than the sum of its proper divisors (30907447593).

51512412615 is a wasteful number, since it uses less digits than its factorization.

51512412615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434160849.

The product of its digits is 12000, while the sum is 33.

The spelling of 51512412615 in words is "fifty-one billion, five hundred twelve million, four hundred twelve thousand, six hundred fifteen".