51536642 has 8 divisors (see below), whose sum is σ = 77335500. Its totient is φ = 25758144.

The previous prime is 51536623. The next prime is 51536659. The reversal of 51536642 is 24663515.

It can be written as a sum of positive squares in 2 ways, for example, as 37466641 + 14070001 = 6121^2 + 3751^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 51536599 and 51536608.

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, 6734 + ... + 12182.

Almost surely, 2^51536642 is an apocalyptic number.

51536642 is a deficient number, since it is larger than the sum of its proper divisors (25798858).

51536642 is a wasteful number, since it uses less digits than its factorization.

51536642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10180.

The product of its digits is 21600, while the sum is 32.

The square root of 51536642 is about 7178.9025623698. The cubic root of 51536642 is about 372.1391595982.

The spelling of 51536642 in words is "fifty-one million, five hundred thirty-six thousand, six hundred forty-two".