51556704 has 48 divisors (see below), whose sum is σ = 137903472. Its totient is φ = 16859648.

The previous prime is 51556667. The next prime is 51556717. The reversal of 51556704 is 40765515.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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, 22 + ... + 10154.

It is an arithmetic number, because the mean of its divisors is an integer number (2872989).

Almost surely, 2^51556704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51556704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68951736).

51556704 is an abundant number, since it is smaller than the sum of its proper divisors (86346768).

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

51556704 is a wasteful number, since it uses less digits than its factorization.

51556704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10199 (or 10191 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 51556704 is about 7180.2997151930. The cubic root of 51556704 is about 372.1874416682.

The spelling of 51556704 in words is "fifty-one million, five hundred fifty-six thousand, seven hundred four".