51902905 has 8 divisors (see below), whose sum is σ = 62385984. Its totient is φ = 41454000.

The previous prime is 51902867. The next prime is 51902909. The reversal of 51902905 is 50920915.

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

It is not a de Polignac number, because 51902905 - 2⁹ = 51902393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51902909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5071 + ... + 11380.

It is an arithmetic number, because the mean of its divisors is an integer number (7798248).

Almost surely, 2^51902905 is an apocalyptic number.

It is an amenable number.

51902905 is a deficient number, since it is larger than the sum of its proper divisors (10483079).

51902905 is a wasteful number, since it uses less digits than its factorization.

51902905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17087.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 51902905 is about 7204.3670783768. The cubic root of 51902905 is about 373.0186580091.

The spelling of 51902905 in words is "fifty-one million, nine hundred two thousand, nine hundred five".