51939156 has 24 divisors (see below), whose sum is σ = 121324000. Its totient is φ = 17294112.

The previous prime is 51939119. The next prime is 51939161. The reversal of 51939156 is 65193915.

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 in 7 ways as a sum of consecutive naturals, for example, 13095 + ... + 16593.

Almost surely, 2^51939156 is an apocalyptic number.

It is an amenable number.

51939156 is an abundant number, since it is smaller than the sum of its proper divisors (69384844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51939156 is a wasteful number, since it uses less digits than its factorization.

51939156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4743 (or 4741 counting only the distinct ones).

The product of its digits is 36450, while the sum is 39.

The square root of 51939156 is about 7206.8825437910. The cubic root of 51939156 is about 373.1054813602.

The spelling of 51939156 in words is "fifty-one million, nine hundred thirty-nine thousand, one hundred fifty-six".