51213124 has 6 divisors (see below), whose sum is σ = 89622974. Its totient is φ = 25606560.

The previous prime is 51213119. The next prime is 51213137. The reversal of 51213124 is 42131215.

It can be written as a sum of positive squares in only one way, i.e., 46676224 + 4536900 = 6832^2 + 2130^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6401637 + ... + 6401644.

Almost surely, 2^51213124 is an apocalyptic number.

It is an amenable number.

51213124 is a deficient number, since it is larger than the sum of its proper divisors (38409850).

51213124 is a wasteful number, since it uses less digits than its factorization.

51213124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12803285 (or 12803283 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 51213124 is about 7156.3345366186. The cubic root of 51213124 is about 371.3588311722.

Adding to 51213124 its reverse (42131215), we get a palindrome (93344339).

The spelling of 51213124 in words is "fifty-one million, two hundred thirteen thousand, one hundred twenty-four".