51156731701 has 4 divisors (see below), whose sum is σ = 51175632352. Its totient is φ = 51137831052.

The previous prime is 51156731669. The next prime is 51156731713. The reversal of 51156731701 is 10713765115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51156731701 - 2⁵ = 51156731669 is a prime.

It is a super-2 number, since 2×51156731701² (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 (51156731501) 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, 9446265 + ... + 9451678.

It is an arithmetic number, because the mean of its divisors is an integer number (12793908088).

Almost surely, 2^51156731701 is an apocalyptic number.

It is an amenable number.

51156731701 is a deficient number, since it is larger than the sum of its proper divisors (18900651).

51156731701 is a wasteful number, since it uses less digits than its factorization.

51156731701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18900650.

The product of its (nonzero) digits is 22050, while the sum is 37.

The spelling of 51156731701 in words is "fifty-one billion, one hundred fifty-six million, seven hundred thirty-one thousand, seven hundred one".