51246264215 has 4 divisors (see below), whose sum is σ = 61495517064. Its totient is φ = 40997011368.

The previous prime is 51246264163. The next prime is 51246264221.

51246264215 is nontrivially palindromic in base 10.

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 51246264215 - 2¹² = 51246260119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5124626417 + ... + 5124626426.

It is an arithmetic number, because the mean of its divisors is an integer number (15373879266).

Almost surely, 2^51246264215 is an apocalyptic number.

51246264215 is a deficient number, since it is larger than the sum of its proper divisors (10249252849).

51246264215 is a wasteful number, since it uses less digits than its factorization.

51246264215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10249252848.

The product of its digits is 115200, while the sum is 38.

The spelling of 51246264215 in words is "fifty-one billion, two hundred forty-six million, two hundred sixty-four thousand, two hundred fifteen".