51090944 has 20 divisors (see below), whose sum is σ = 102083124. Its totient is φ = 25545216.

The previous prime is 51090937. The next prime is 51090971. The reversal of 51090944 is 44909015.

It is a super-2 number, since 2×51090944² = 5220569117622272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 51090944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49382 + ... + 50405.

Almost surely, 2^51090944 is an apocalyptic number.

It is an amenable number.

51090944 is a deficient number, since it is larger than the sum of its proper divisors (50992180).

51090944 is an frugal number, since it uses more digits than its factorization.

51090944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99805 (or 99789 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 51090944 is about 7147.7929460778. The cubic root of 51090944 is about 371.0632770355.

Adding to 51090944 its reverse (44909015), we get a palindrome (95999959).

The spelling of 51090944 in words is "fifty-one million, ninety thousand, nine hundred forty-four".