51024931451 has 4 divisors (see below), whose sum is σ = 54949926192. Its totient is φ = 47099936712.

The previous prime is 51024931439. The next prime is 51024931453. The reversal of 51024931451 is 15413942015.

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-51024931451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51024931453) 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, 1962497351 + ... + 1962497376.

It is an arithmetic number, because the mean of its divisors is an integer number (13737481548).

Almost surely, 2^51024931451 is an apocalyptic number.

51024931451 is a deficient number, since it is larger than the sum of its proper divisors (3924994741).

51024931451 is a wasteful number, since it uses less digits than its factorization.

51024931451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924994740.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 51024931451 in words is "fifty-one billion, twenty-four million, nine hundred thirty-one thousand, four hundred fifty-one".