51904457 has 8 divisors (see below), whose sum is σ = 56680992. Its totient is φ = 47137600.

The previous prime is 51904439. The next prime is 51904459. The reversal of 51904457 is 75440915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51904457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51904459) 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, 13238 + ... + 16704.

It is an arithmetic number, because the mean of its divisors is an integer number (7085124).

Almost surely, 2^51904457 is an apocalyptic number.

It is an amenable number.

51904457 is a deficient number, since it is larger than the sum of its proper divisors (4776535).

51904457 is a wasteful number, since it uses less digits than its factorization.

51904457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4839.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 51904457 is about 7204.4747900177. The cubic root of 51904457 is about 373.0223759718.

The spelling of 51904457 in words is "fifty-one million, nine hundred four thousand, four hundred fifty-seven".