51021351255 has 32 divisors (see below), whose sum is σ = 95281219584. Its totient is φ = 22827787776.

The previous prime is 51021351253. The next prime is 51021351257. The reversal of 51021351255 is 55215312015.

It is an interprime number because it is at equal distance from previous prime (51021351253) and next prime (51021351257).

It is not a de Polignac number, because 51021351255 - 2¹ = 51021351253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51021351253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5164402 + ... + 5174271.

It is an arithmetic number, because the mean of its divisors is an integer number (2977538112).

Almost surely, 2^51021351255 is an apocalyptic number.

51021351255 is a deficient number, since it is larger than the sum of its proper divisors (44259868329).

51021351255 is a wasteful number, since it uses less digits than its factorization.

51021351255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10338735.

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 51021351255 in words is "fifty-one billion, twenty-one million, three hundred fifty-one thousand, two hundred fifty-five".