51556446 has 32 divisors (see below), whose sum is σ = 115960320. Its totient is φ = 16976952.

The previous prime is 51556399. The next prime is 51556451. The reversal of 51556446 is 64465515.

51556446 is a `hidden beast` number, since 5 + 1 + 5 + 5 + 644 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 51556446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1270 + ... + 10233.

It is an arithmetic number, because the mean of its divisors is an integer number (3623760).

Almost surely, 2^51556446 is an apocalyptic number.

51556446 is an abundant number, since it is smaller than the sum of its proper divisors (64403874).

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

51556446 is a wasteful number, since it uses less digits than its factorization.

51556446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11597 (or 11591 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 51556446 is about 7180.2817493466. The cubic root of 51556446 is about 372.1868208339.

The spelling of 51556446 in words is "fifty-one million, five hundred fifty-six thousand, four hundred forty-six".