51054554531 has 4 divisors (see below), whose sum is σ = 51134203464. Its totient is φ = 50974905600.

The previous prime is 51054554519. The next prime is 51054554567. The reversal of 51054554531 is 13545545015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51054554531 is a prime.

It is a super-2 number, since 2×51054554531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51054554231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39823505 + ... + 39824786.

It is an arithmetic number, because the mean of its divisors is an integer number (12783550866).

Almost surely, 2^51054554531 is an apocalyptic number.

51054554531 is a deficient number, since it is larger than the sum of its proper divisors (79648933).

51054554531 is an equidigital number, since it uses as much as digits as its factorization.

51054554531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79648932.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 51054554531 in words is "fifty-one billion, fifty-four million, five hundred fifty-four thousand, five hundred thirty-one".