51100000055031 has 4 divisors (see below), whose sum is σ = 68133333406712. Its totient is φ = 34066666703352.

The previous prime is 51100000054991. The next prime is 51100000055047. The reversal of 51100000055031 is 13055000000115.

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

It is not a de Polignac number, because 51100000055031 - 2⁶ = 51100000054967 is a prime.

It is a super-2 number, since 2×51100000055031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51100000054989 and 51100000055007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51100000054031) 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, 8516666675836 + ... + 8516666675841.

It is an arithmetic number, because the mean of its divisors is an integer number (17033333351678).

Almost surely, 2^{51100000055031} is an apocalyptic number.

51100000055031 is a deficient number, since it is larger than the sum of its proper divisors (17033333351681).

51100000055031 is a wasteful number, since it uses less digits than its factorization.

51100000055031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17033333351680.

The product of its (nonzero) digits is 375, while the sum is 21.

Adding to 51100000055031 its reverse (13055000000115), we get a palindrome (64155000055146).

The spelling of 51100000055031 in words is "fifty-one trillion, one hundred billion, fifty-five thousand, thirty-one".