51503029881 has 16 divisors (see below), whose sum is σ = 73527134400. Its totient is φ = 31952526848.

The previous prime is 51503029843. The next prime is 51503029927. The reversal of 51503029881 is 18892030515.

It is a cyclic number.

It is not a de Polignac number, because 51503029881 - 2⁶ = 51503029817 is a prime.

It is a super-2 number, since 2×51503029881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51503029811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5668851 + ... + 5677928.

It is an arithmetic number, because the mean of its divisors is an integer number (4595445900).

Almost surely, 2^51503029881 is an apocalyptic number.

51503029881 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

51503029881 is a deficient number, since it is larger than the sum of its proper divisors (22024104519).

51503029881 is a wasteful number, since it uses less digits than its factorization.

51503029881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11346888.

The product of its (nonzero) digits is 86400, while the sum is 42.

The spelling of 51503029881 in words is "fifty-one billion, five hundred three million, twenty-nine thousand, eight hundred eighty-one".