51120531455 has 16 divisors (see below), whose sum is σ = 70139110464. Its totient is φ = 35038602240.

The previous prime is 51120531401. The next prime is 51120531457. The reversal of 51120531455 is 55413502115.

It is not a de Polignac number, because 51120531455 - 2¹⁸ = 51120269311 is a prime.

It is a super-2 number, since 2×51120531455² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51120531457) 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, 241736 + ... + 400845.

It is an arithmetic number, because the mean of its divisors is an integer number (4383694404).

Almost surely, 2^51120531455 is an apocalyptic number.

51120531455 is a deficient number, since it is larger than the sum of its proper divisors (19018579009).

51120531455 is a wasteful number, since it uses less digits than its factorization.

51120531455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644866.

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 51120531455 in words is "fifty-one billion, one hundred twenty million, five hundred thirty-one thousand, four hundred fifty-five".