51312544 has 12 divisors (see below), whose sum is σ = 101021634. Its totient is φ = 25656256.

The previous prime is 51312497. The next prime is 51312551. The reversal of 51312544 is 44521315.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 49843600 + 1468944 = 7060^2 + 1212^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801727 + ... + 801790.

Almost surely, 2^51312544 is an apocalyptic number.

It is an amenable number.

51312544 is a deficient number, since it is larger than the sum of its proper divisors (49709090).

51312544 is a wasteful number, since it uses less digits than its factorization.

51312544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603527 (or 1603519 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 51312544 is about 7163.2774621677. The cubic root of 51312544 is about 371.5989820463.

Adding to 51312544 its reverse (44521315), we get a palindrome (95833859).

The spelling of 51312544 in words is "fifty-one million, three hundred twelve thousand, five hundred forty-four".