51900523 has 4 divisors (see below), whose sum is σ = 52117920. Its totient is φ = 51683128.

The previous prime is 51900521. The next prime is 51900539. The reversal of 51900523 is 32500915.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32500915 = 5 ⋅6500183.

It is a cyclic number.

It is not a de Polignac number, because 51900523 - 2¹ = 51900521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51900521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108340 + ... + 108817.

It is an arithmetic number, because the mean of its divisors is an integer number (13029480).

Almost surely, 2^51900523 is an apocalyptic number.

51900523 is a deficient number, since it is larger than the sum of its proper divisors (217397).

51900523 is a wasteful number, since it uses less digits than its factorization.

51900523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217396.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 51900523 is about 7204.2017600842. The cubic root of 51900523 is about 373.0129515588.

The spelling of 51900523 in words is "fifty-one million, nine hundred thousand, five hundred twenty-three".