51135556 has 6 divisors (see below), whose sum is σ = 89487230. Its totient is φ = 25567776.

The previous prime is 51135529. The next prime is 51135563. The reversal of 51135556 is 65553115.

It can be written as a sum of positive squares in only one way, i.e., 27457600 + 23677956 = 5240^2 + 4866^2 .

It is a super-2 number, since 2×51135556² = 5229690174858272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6391941 + ... + 6391948.

Almost surely, 2^51135556 is an apocalyptic number.

It is an amenable number.

51135556 is a deficient number, since it is larger than the sum of its proper divisors (38351674).

51135556 is a wasteful number, since it uses less digits than its factorization.

51135556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12783893 (or 12783891 counting only the distinct ones).

The product of its digits is 11250, while the sum is 31.

The square root of 51135556 is about 7150.9129487080. The cubic root of 51135556 is about 371.1712482840.

The spelling of 51135556 in words is "fifty-one million, one hundred thirty-five thousand, five hundred fifty-six".