51904907 has 4 divisors (see below), whose sum is σ = 51926376. Its totient is φ = 51883440.

The previous prime is 51904877. The next prime is 51904921. The reversal of 51904907 is 70940915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51904907 - 2⁶ = 51904843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51904507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6569 + ... + 12122.

It is an arithmetic number, because the mean of its divisors is an integer number (12981594).

Almost surely, 2^51904907 is an apocalyptic number.

51904907 is a deficient number, since it is larger than the sum of its proper divisors (21469).

51904907 is a wasteful number, since it uses less digits than its factorization.

51904907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21468.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 51904907 is about 7204.5060205402. The cubic root of 51904907 is about 373.0234539754.

The spelling of 51904907 in words is "fifty-one million, nine hundred four thousand, nine hundred seven".