51901271 has 8 divisors (see below), whose sum is σ = 56026080. Its totient is φ = 47932192.

The previous prime is 51901249. The next prime is 51901273. The reversal of 51901271 is 17210915.

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 51901271 - 2¹⁸ = 51639127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51901271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51901273) 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, 38240 + ... + 39573.

It is an arithmetic number, because the mean of its divisors is an integer number (7003260).

Almost surely, 2^51901271 is an apocalyptic number.

51901271 is a deficient number, since it is larger than the sum of its proper divisors (4124809).

51901271 is a wasteful number, since it uses less digits than its factorization.

51901271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77865.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 51901271 is about 7204.2536740456. The cubic root of 51901271 is about 373.0147435276.

The spelling of 51901271 in words is "fifty-one million, nine hundred one thousand, two hundred seventy-one".