51031044420 has 48 divisors (see below), whose sum is σ = 146371978368. Its totient is φ = 13276368640.

The previous prime is 51031044359. The next prime is 51031044451. The reversal of 51031044420 is 2444013015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10369704 + ... + 10374623.

It is an arithmetic number, because the mean of its divisors is an integer number (3049416216).

Almost surely, 2^51031044420 is an apocalyptic number.

It is an amenable number.

51031044420 is an abundant number, since it is smaller than the sum of its proper divisors (95340933948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51031044420 is a wasteful number, since it uses less digits than its factorization.

51031044420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20744380 (or 20744378 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 51031044420 its reverse (2444013015), we get a palindrome (53475057435).

The spelling of 51031044420 in words is "fifty-one billion, thirty-one million, forty-four thousand, four hundred twenty".