51331372 has 6 divisors (see below), whose sum is σ = 89829908. Its totient is φ = 25665684.

The previous prime is 51331361. The next prime is 51331391. The reversal of 51331372 is 27313315.

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, 6416418 + ... + 6416425.

Almost surely, 2^51331372 is an apocalyptic number.

It is an amenable number.

51331372 is a deficient number, since it is larger than the sum of its proper divisors (38498536).

51331372 is a wasteful number, since it uses less digits than its factorization.

51331372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12832847 (or 12832845 counting only the distinct ones).

The product of its digits is 1890, while the sum is 25.

The square root of 51331372 is about 7164.5915445334. The cubic root of 51331372 is about 371.6444264902.

Adding to 51331372 its reverse (27313315), we get a palindrome (78644687).

The spelling of 51331372 in words is "fifty-one million, three hundred thirty-one thousand, three hundred seventy-two".