51556051 has 4 divisors (see below), whose sum is σ = 51572704. Its totient is φ = 51539400.

The previous prime is 51556049. The next prime is 51556061. The reversal of 51556051 is 15065515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51556051 - 2¹ = 51556049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51556061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2160 + ... + 10381.

It is an arithmetic number, because the mean of its divisors is an integer number (12893176).

Almost surely, 2^51556051 is an apocalyptic number.

51556051 is a deficient number, since it is larger than the sum of its proper divisors (16653).

51556051 is a wasteful number, since it uses less digits than its factorization.

51556051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16652.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 51556051 is about 7180.2542434095. The cubic root of 51556051 is about 372.1858703276.

The spelling of 51556051 in words is "fifty-one million, five hundred fifty-six thousand, fifty-one".