51444520 has 32 divisors (see below), whose sum is σ = 116008200. Its totient is φ = 20531968.

The previous prime is 51444509. The next prime is 51444527. The reversal of 51444520 is 2544415.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38613796 + 12830724 = 6214^2 + 3582^2 .

It is not an unprimeable number, because it can be changed into a prime (51444527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21126 + ... + 23434.

Almost surely, 2^51444520 is an apocalyptic number.

It is an amenable number.

51444520 is an abundant number, since it is smaller than the sum of its proper divisors (64563680).

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

51444520 is a wasteful number, since it uses less digits than its factorization.

51444520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877 (or 2873 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 51444520 is about 7172.4835308281. The cubic root of 51444520 is about 371.9172938268.

Adding to 51444520 its reverse (2544415), we get a palindrome (53988935).

The spelling of 51444520 in words is "fifty-one million, four hundred forty-four thousand, five hundred twenty".