51902901 has 6 divisors (see below), whose sum is σ = 74970870. Its totient is φ = 34601928.

The previous prime is 51902867. The next prime is 51902909. The reversal of 51902901 is 10920915.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 37088100 + 14814801 = 6090^2 + 3849^2 .

It is not a de Polignac number, because 51902901 - 2¹⁰ = 51901877 is a prime.

It is a super-2 number, since 2×51902901² = 5387822264431602, which contains 22 as substring.

It is a Curzon number.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 2883486 + ... + 2883503.

It is an arithmetic number, because the mean of its divisors is an integer number (12495145).

Almost surely, 2^51902901 is an apocalyptic number.

It is an amenable number.

51902901 is a deficient number, since it is larger than the sum of its proper divisors (23067969).

51902901 is a wasteful number, since it uses less digits than its factorization.

51902901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5766995 (or 5766992 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 51902901 is about 7204.3668007674. The cubic root of 51902901 is about 373.0186484266.

The spelling of 51902901 in words is "fifty-one million, nine hundred two thousand, nine hundred one".