51640014 has 16 divisors (see below), whose sum is σ = 107770752. Its totient is φ = 16464888.

The previous prime is 51640007. The next prime is 51640031. The reversal of 51640014 is 41004615.

It is a congruent number.

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, 186964 + ... + 187239.

It is an arithmetic number, because the mean of its divisors is an integer number (6735672).

Almost surely, 2^51640014 is an apocalyptic number.

51640014 is an abundant number, since it is smaller than the sum of its proper divisors (56130738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51640014 is a wasteful number, since it uses less digits than its factorization.

51640014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374231.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 51640014 is about 7186.0986633917. The cubic root of 51640014 is about 372.3878051972.

Adding to 51640014 its reverse (41004615), we get a palindrome (92644629).

The spelling of 51640014 in words is "fifty-one million, six hundred forty thousand, fourteen".