51007722231 has 4 divisors (see below), whose sum is σ = 68010296312. Its totient is φ = 34005148152.

The previous prime is 51007722223. The next prime is 51007722251. The reversal of 51007722231 is 13222770015.

51007722231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51007722231 - 2³ = 51007722223 is a prime.

It is a super-2 number, since 2×51007722231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51007722211) 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, 8501287036 + ... + 8501287041.

It is an arithmetic number, because the mean of its divisors is an integer number (17002574078).

Almost surely, 2^51007722231 is an apocalyptic number.

51007722231 is a deficient number, since it is larger than the sum of its proper divisors (17002574081).

51007722231 is a wasteful number, since it uses less digits than its factorization.

51007722231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17002574080.

The product of its (nonzero) digits is 5880, while the sum is 30.

The spelling of 51007722231 in words is "fifty-one billion, seven million, seven hundred twenty-two thousand, two hundred thirty-one".