51902289 has 20 divisors (see below), whose sum is σ = 78524160. Its totient is φ = 34159320.

The previous prime is 51902273. The next prime is 51902299. The reversal of 51902289 is 98220915.

It is not a de Polignac number, because 51902289 - 2⁴ = 51902273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51902209) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2344 + ... + 10454.

It is an arithmetic number, because the mean of its divisors is an integer number (3926208).

Almost surely, 2^51902289 is an apocalyptic number.

It is an amenable number.

51902289 is a deficient number, since it is larger than the sum of its proper divisors (26621871).

51902289 is an equidigital number, since it uses as much as digits as its factorization.

51902289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8202 (or 8193 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 51902289 is about 7204.3243264029. The cubic root of 51902289 is about 373.0171823023.

The spelling of 51902289 in words is "fifty-one million, nine hundred two thousand, two hundred eighty-nine".