51554232515 has 4 divisors (see below), whose sum is σ = 61865079024. Its totient is φ = 41243386008.

The previous prime is 51554232497. The next prime is 51554232577. The reversal of 51554232515 is 51523245515.

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 51554232515 - 2³⁰ = 50480490691 is a prime.

It is a Duffinian 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, 5155423247 + ... + 5155423256.

It is an arithmetic number, because the mean of its divisors is an integer number (15466269756).

Almost surely, 2^51554232515 is an apocalyptic number.

51554232515 is a deficient number, since it is larger than the sum of its proper divisors (10310846509).

51554232515 is a wasteful number, since it uses less digits than its factorization.

51554232515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10310846508.

The product of its digits is 150000, while the sum is 38.

The spelling of 51554232515 in words is "fifty-one billion, five hundred fifty-four million, two hundred thirty-two thousand, five hundred fifteen".