51665414 has 32 divisors (see below), whose sum is σ = 86378400. Its totient is φ = 23063040.

The previous prime is 51665413. The next prime is 51665423. The reversal of 51665414 is 41456615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51665413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59717 + ... + 60575.

It is an arithmetic number, because the mean of its divisors is an integer number (2699325).

Almost surely, 2^51665414 is an apocalyptic number.

51665414 is a deficient number, since it is larger than the sum of its proper divisors (34712986).

51665414 is a wasteful number, since it uses less digits than its factorization.

51665414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968.

The product of its digits is 14400, while the sum is 32.

The square root of 51665414 is about 7187.8657472159. The cubic root of 51665414 is about 372.4488502354.

The spelling of 51665414 in words is "fifty-one million, six hundred sixty-five thousand, four hundred fourteen".