251983045 has 4 divisors (see below), whose sum is σ = 302379660. Its totient is φ = 201586432.

The previous prime is 251983037. The next prime is 251983057. The reversal of 251983045 is 540389152.

251983045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36216324 + 215766721 = 6018^2 + 14689^2 .

It is a cyclic number.

It is not a de Polignac number, because 251983045 - 2³ = 251983037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251982995 and 251983013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25198300 + ... + 25198309.

It is an arithmetic number, because the mean of its divisors is an integer number (75594915).

Almost surely, 2^251983045 is an apocalyptic number.

It is an amenable number.

251983045 is a deficient number, since it is larger than the sum of its proper divisors (50396615).

251983045 is an equidigital number, since it uses as much as digits as its factorization.

251983045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50396614.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 251983045 is about 15873.9738251013. The cubic root of 251983045 is about 631.6217935912.

The spelling of 251983045 in words is "two hundred fifty-one million, nine hundred eighty-three thousand, forty-five".