51031872623 has 4 divisors (see below), whose sum is σ = 51508806120. Its totient is φ = 50554939128.

The previous prime is 51031872583. The next prime is 51031872631. The reversal of 51031872623 is 32627813015.

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 51031872623 - 2⁶ = 51031872559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51031872643) 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, 238466588 + ... + 238466801.

It is an arithmetic number, because the mean of its divisors is an integer number (12877201530).

Almost surely, 2^51031872623 is an apocalyptic number.

51031872623 is a deficient number, since it is larger than the sum of its proper divisors (476933497).

51031872623 is a wasteful number, since it uses less digits than its factorization.

51031872623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476933496.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 51031872623 in words is "fifty-one billion, thirty-one million, eight hundred seventy-two thousand, six hundred twenty-three".