51291696 has 20 divisors (see below), whose sum is σ = 132503672. Its totient is φ = 17097216.

The previous prime is 51291683. The next prime is 51291707. The reversal of 51291696 is 69619215.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 534241 + ... + 534336.

Almost surely, 2^51291696 is an apocalyptic number.

It is an amenable number.

51291696 is an abundant number, since it is smaller than the sum of its proper divisors (81211976).

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

51291696 is a wasteful number, since it uses less digits than its factorization.

51291696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068588 (or 1068582 counting only the distinct ones).

The product of its digits is 29160, while the sum is 39.

The square root of 51291696 is about 7161.8221145181. The cubic root of 51291696 is about 371.5486490322.

The spelling of 51291696 in words is "fifty-one million, two hundred ninety-one thousand, six hundred ninety-six".