51521555501001 has 96 divisors (see below), whose sum is σ = 79884960210432. Its totient is φ = 31883846860800.

The previous prime is 51521555500997. The next prime is 51521555501081. The reversal of 51521555501001 is 10010555512515.

51521555501001 is a `hidden beast` number, since 5 + 1 + 52 + 1 + 55 + 550 + 1 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 51521555501001 - 2² = 51521555500997 is a prime.

It is a super-2 number, since 2×51521555501001² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51521555501081) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6016760346 + ... + 6016768908.

It is an arithmetic number, because the mean of its divisors is an integer number (832135002192).

Almost surely, 2^{51521555501001} is an apocalyptic number.

51521555501001 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

51521555501001 is a deficient number, since it is larger than the sum of its proper divisors (28363404709431).

51521555501001 is a wasteful number, since it uses less digits than its factorization.

51521555501001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10143 (or 10140 counting only the distinct ones).

The product of its (nonzero) digits is 31250, while the sum is 36.

The spelling of 51521555501001 in words is "fifty-one trillion, five hundred twenty-one billion, five hundred fifty-five million, five hundred one thousand, one".