50251813 has 8 divisors (see below), whose sum is σ = 53938008. Its totient is φ = 46646784.

The previous prime is 50251807. The next prime is 50251819. The reversal of 50251813 is 31815205.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (50251807) and next prime (50251819).

It can be written as a sum of positive squares in 4 ways, for example, as 5602689 + 44649124 = 2367^2 + 6682^2 .

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 50251813 - 2⁹ = 50251301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50251819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19006 + ... + 21487.

It is an arithmetic number, because the mean of its divisors is an integer number (6742251).

Almost surely, 2^50251813 is an apocalyptic number.

It is an amenable number.

50251813 is a deficient number, since it is larger than the sum of its proper divisors (3686195).

50251813 is a wasteful number, since it uses less digits than its factorization.

50251813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40583.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 50251813 is about 7088.8513173856. The cubic root of 50251813 is about 369.0205725366.

The spelling of 50251813 in words is "fifty million, two hundred fifty-one thousand, eight hundred thirteen".