51451656 has 32 divisors (see below), whose sum is σ = 136196640. Its totient is φ = 16141568.

The previous prime is 51451627. The next prime is 51451663. The reversal of 51451656 is 65615415.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62646 + ... + 63461.

It is an arithmetic number, because the mean of its divisors is an integer number (4256145).

Almost surely, 2^51451656 is an apocalyptic number.

It is an amenable number.

51451656 is an abundant number, since it is smaller than the sum of its proper divisors (84744984).

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

51451656 is a wasteful number, since it uses less digits than its factorization.

51451656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126133 (or 126129 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

The square root of 51451656 is about 7172.9809702801. The cubic root of 51451656 is about 371.9344895625.

The spelling of 51451656 in words is "fifty-one million, four hundred fifty-one thousand, six hundred fifty-six".