51939696 has 40 divisors (see below), whose sum is σ = 138808080. Its totient is φ = 16715776.

The previous prime is 51939691. The next prime is 51939697. The reversal of 51939696 is 69693915.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51939691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17265 + ... + 20048.

It is an arithmetic number, because the mean of its divisors is an integer number (3470202).

Almost surely, 2^51939696 is an apocalyptic number.

It is an amenable number.

51939696 is an abundant number, since it is smaller than the sum of its proper divisors (86868384).

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

51939696 is a wasteful number, since it uses less digits than its factorization.

51939696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37353 (or 37347 counting only the distinct ones).

The product of its digits is 393660, while the sum is 48.

The square root of 51939696 is about 7206.9200078813. The cubic root of 51939696 is about 373.1067743876.

The spelling of 51939696 in words is "fifty-one million, nine hundred thirty-nine thousand, six hundred ninety-six".