51507470507 has 4 divisors (see below), whose sum is σ = 51508317000. Its totient is φ = 51506624016.

The previous prime is 51507470473. The next prime is 51507470537. The reversal of 51507470507 is 70507470515.

It is a happy number.

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 51507470507 - 2¹⁰ = 51507469483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51507470537) 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, 324257 + ... + 456242.

It is an arithmetic number, because the mean of its divisors is an integer number (12877079250).

Almost surely, 2^51507470507 is an apocalyptic number.

51507470507 is a deficient number, since it is larger than the sum of its proper divisors (846493).

51507470507 is an equidigital number, since it uses as much as digits as its factorization.

51507470507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846492.

The product of its (nonzero) digits is 171500, while the sum is 41.

The spelling of 51507470507 in words is "fifty-one billion, five hundred seven million, four hundred seventy thousand, five hundred seven".