51894701 has 4 divisors (see below), whose sum is σ = 51937500. Its totient is φ = 51851904.

The previous prime is 51894631. The next prime is 51894707. The reversal of 51894701 is 10749815.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9449476 + 42445225 = 3074^2 + 6515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51894701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51894707) 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, 19526 + ... + 22023.

It is an arithmetic number, because the mean of its divisors is an integer number (12984375).

Almost surely, 2^51894701 is an apocalyptic number.

It is an amenable number.

51894701 is a deficient number, since it is larger than the sum of its proper divisors (42799).

51894701 is a wasteful number, since it uses less digits than its factorization.

51894701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42798.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 51894701 is about 7203.7976790024. The cubic root of 51894701 is about 372.9990033204. Note that the first 3 decimals are identical.

The spelling of 51894701 in words is "fifty-one million, eight hundred ninety-four thousand, seven hundred one".