51939914 has 16 divisors (see below), whose sum is σ = 85281000. Its totient is φ = 23578560.

The previous prime is 51939869. The next prime is 51939929. The reversal of 51939914 is 41993915.

It can be written as a sum of positive squares in 4 ways, for example, as 14326225 + 37613689 = 3785^2 + 6133^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14789 + ... + 17960.

Almost surely, 2^51939914 is an apocalyptic number.

51939914 is a deficient number, since it is larger than the sum of its proper divisors (33341086).

51939914 is a wasteful number, since it uses less digits than its factorization.

51939914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32825.

The product of its digits is 43740, while the sum is 41.

The square root of 51939914 is about 7206.9351322181. The cubic root of 51939914 is about 373.1072963850.

The spelling of 51939914 in words is "fifty-one million, nine hundred thirty-nine thousand, nine hundred fourteen".