51031353055 has 4 divisors (see below), whose sum is σ = 61237623672. Its totient is φ = 40825082440.

The previous prime is 51031353019. The next prime is 51031353077. The reversal of 51031353055 is 55035313015.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51031353055 - 2⁷ = 51031352927 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 5103135301 + ... + 5103135310.

It is an arithmetic number, because the mean of its divisors is an integer number (15309405918).

Almost surely, 2^51031353055 is an apocalyptic number.

51031353055 is a deficient number, since it is larger than the sum of its proper divisors (10206270617).

51031353055 is a wasteful number, since it uses less digits than its factorization.

51031353055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10206270616.

The product of its (nonzero) digits is 16875, while the sum is 31.

The spelling of 51031353055 in words is "fifty-one billion, thirty-one million, three hundred fifty-three thousand, fifty-five".