51139292 has 6 divisors (see below), whose sum is σ = 89493768. Its totient is φ = 25569644.

The previous prime is 51139261. The next prime is 51139301. The reversal of 51139292 is 29293115.

It is a super-2 number, since 2×51139292² = 5230454372522528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6392408 + ... + 6392415.

It is an arithmetic number, because the mean of its divisors is an integer number (14915628).

Almost surely, 2^51139292 is an apocalyptic number.

It is an amenable number.

51139292 is a deficient number, since it is larger than the sum of its proper divisors (38354476).

51139292 is a wasteful number, since it uses less digits than its factorization.

51139292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12784827 (or 12784825 counting only the distinct ones).

The product of its digits is 4860, while the sum is 32.

The square root of 51139292 is about 7151.1741693235. The cubic root of 51139292 is about 371.1802874088.

The spelling of 51139292 in words is "fifty-one million, one hundred thirty-nine thousand, two hundred ninety-two".