51999363 has 24 divisors (see below), whose sum is σ = 81291392. Its totient is φ = 31840128.

The previous prime is 51999359. The next prime is 51999383. The reversal of 51999363 is 36399915.

It is not a de Polignac number, because 51999363 - 2² = 51999359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51999383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25095 + ... + 27087.

Almost surely, 2^51999363 is an apocalyptic number.

51999363 is a deficient number, since it is larger than the sum of its proper divisors (29292029).

51999363 is a wasteful number, since it uses less digits than its factorization.

51999363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235 (or 2232 counting only the distinct ones).

The product of its digits is 196830, while the sum is 45.

The square root of 51999363 is about 7211.0583827896. The cubic root of 51999363 is about 373.2495915668.

The spelling of 51999363 in words is "fifty-one million, nine hundred ninety-nine thousand, three hundred sixty-three".