51001355155 has 32 divisors (see below), whose sum is σ = 66945761280. Its totient is φ = 37132469760.

The previous prime is 51001355149. The next prime is 51001355177. The reversal of 51001355155 is 55155310015.

It is not a de Polignac number, because 51001355155 - 2³ = 51001355147 is a prime.

It is a super-2 number, since 2×51001355155² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3594966 + ... + 3609124.

It is an arithmetic number, because the mean of its divisors is an integer number (2092055040).

Almost surely, 2^51001355155 is an apocalyptic number.

51001355155 is a deficient number, since it is larger than the sum of its proper divisors (15944406125).

51001355155 is a wasteful number, since it uses less digits than its factorization.

51001355155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15579.

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

The spelling of 51001355155 in words is "fifty-one billion, one million, three hundred fifty-five thousand, one hundred fifty-five".