51008694 has 16 divisors (see below), whose sum is σ = 111291840. Its totient is φ = 15457160.

The previous prime is 51008693. The next prime is 51008723. The reversal of 51008694 is 49680015.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51008693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386364 + ... + 386495.

It is an arithmetic number, because the mean of its divisors is an integer number (6955740).

Almost surely, 2^51008694 is an apocalyptic number.

51008694 is an abundant number, since it is smaller than the sum of its proper divisors (60283146).

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

51008694 is a wasteful number, since it uses less digits than its factorization.

51008694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772875.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 51008694 is about 7142.0371043562. The cubic root of 51008694 is about 370.8640483361.

The spelling of 51008694 in words is "fifty-one million, eight thousand, six hundred ninety-four".