51505031155 has 16 divisors (see below), whose sum is σ = 65447007264. Its totient is φ = 38777105920.

The previous prime is 51505031143. The next prime is 51505031167. The reversal of 51505031155 is 55113050515.

It is an interprime number because it is at equal distance from previous prime (51505031143) and next prime (51505031167).

It is not a de Polignac number, because 51505031155 - 2¹⁵ = 51504998387 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2005224 + ... + 2030746.

It is an arithmetic number, because the mean of its divisors is an integer number (4090437954).

Almost surely, 2^51505031155 is an apocalyptic number.

51505031155 is a deficient number, since it is larger than the sum of its proper divisors (13941976109).

51505031155 is a wasteful number, since it uses less digits than its factorization.

51505031155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49286.

The product of its (nonzero) digits is 9375, while the sum is 31.

It can be divided in two parts, 5150 and 5031155, that added together give a palindrome (5036305).

The spelling of 51505031155 in words is "fifty-one billion, five hundred five million, thirty-one thousand, one hundred fifty-five".