51902399 has 8 divisors (see below), whose sum is σ = 52874592. Its totient is φ = 50934240.

The previous prime is 51902393. The next prime is 51902437. The reversal of 51902399 is 99320915.

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

It is a cyclic number.

It is not a de Polignac number, because 51902399 - 2²⁴ = 35125183 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 (51902393) 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, 39182 + ... + 40484.

It is an arithmetic number, because the mean of its divisors is an integer number (6609324).

Almost surely, 2^51902399 is an apocalyptic number.

51902399 is a deficient number, since it is larger than the sum of its proper divisors (972193).

51902399 is a wasteful number, since it uses less digits than its factorization.

51902399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017.

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 51902399 is about 7204.3319607025. The cubic root of 51902399 is about 373.0174458223.

The spelling of 51902399 in words is "fifty-one million, nine hundred two thousand, three hundred ninety-nine".