51400372 has 6 divisors (see below), whose sum is σ = 89950658. Its totient is φ = 25700184.

The previous prime is 51400361. The next prime is 51400411. The reversal of 51400372 is 27300415.

It can be written as a sum of positive squares in only one way, i.e., 44142736 + 7257636 = 6644^2 + 2694^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6425043 + ... + 6425050.

Almost surely, 2^51400372 is an apocalyptic number.

It is an amenable number.

51400372 is a deficient number, since it is larger than the sum of its proper divisors (38550286).

51400372 is a wasteful number, since it uses less digits than its factorization.

51400372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12850097 (or 12850095 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 51400372 is about 7169.4052751954. The cubic root of 51400372 is about 371.8108743041.

Adding to 51400372 its reverse (27300415), we get a palindrome (78700787).

The spelling of 51400372 in words is "fifty-one million, four hundred thousand, three hundred seventy-two".