51123531355 has 32 divisors (see below), whose sum is σ = 66797740800. Its totient is φ = 37335969792.

The previous prime is 51123531341. The next prime is 51123531377. The reversal of 51123531355 is 55313532115.

It is a cyclic number.

It is not a de Polignac number, because 51123531355 - 2¹⁷ = 51123400283 is a prime.

It is a super-2 number, since 2×51123531355² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51123531355.

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, 13043086 + ... + 13047004.

It is an arithmetic number, because the mean of its divisors is an integer number (2087429400).

Almost surely, 2^51123531355 is an apocalyptic number.

51123531355 is a deficient number, since it is larger than the sum of its proper divisors (15674209445).

51123531355 is a wasteful number, since it uses less digits than its factorization.

51123531355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6103.

The product of its digits is 33750, while the sum is 34.

The spelling of 51123531355 in words is "fifty-one billion, one hundred twenty-three million, five hundred thirty-one thousand, three hundred fifty-five".