51561106 has 8 divisors (see below), whose sum is σ = 78107724. Its totient is φ = 25525200.

The previous prime is 51561061. The next prime is 51561127. The reversal of 51561106 is 60116515.

It can be written as a sum of positive squares in 2 ways, for example, as 36421225 + 15139881 = 6035^2 + 3891^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127425 + ... + 127828.

Almost surely, 2^51561106 is an apocalyptic number.

51561106 is a deficient number, since it is larger than the sum of its proper divisors (26546618).

51561106 is a wasteful number, since it uses less digits than its factorization.

51561106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255356.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 51561106 is about 7180.6062418155. The cubic root of 51561106 is about 372.1980340346.

The spelling of 51561106 in words is "fifty-one million, five hundred sixty-one thousand, one hundred six".