51406635 has 24 divisors (see below), whose sum is σ = 95680656. Its totient is φ = 23499840.

The previous prime is 51406601. The next prime is 51406637. The reversal of 51406635 is 53660415.

It is not a de Polignac number, because 51406635 - 2⁸ = 51406379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51406637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34236 + ... + 35705.

It is an arithmetic number, because the mean of its divisors is an integer number (3986694).

Almost surely, 2^51406635 is an apocalyptic number.

51406635 is a deficient number, since it is larger than the sum of its proper divisors (44274021).

51406635 is a wasteful number, since it uses less digits than its factorization.

51406635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69963 (or 69956 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 51406635 is about 7169.8420484694. The cubic root of 51406635 is about 371.8259750828.

The spelling of 51406635 in words is "fifty-one million, four hundred six thousand, six hundred thirty-five".