250531081 has 4 divisors (see below), whose sum is σ = 252443664. Its totient is φ = 248618500.

The previous prime is 250531069. The next prime is 250531117. The reversal of 250531081 is 180135052.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 250531081 - 2⁵ = 250531049 is a prime.

It is a super-2 number, since 2×250531081² = 125531645094057122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (250531481) 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, 956095 + ... + 956356.

It is an arithmetic number, because the mean of its divisors is an integer number (63110916).

Almost surely, 2^250531081 is an apocalyptic number.

It is an amenable number.

250531081 is a deficient number, since it is larger than the sum of its proper divisors (1912583).

250531081 is a wasteful number, since it uses less digits than its factorization.

250531081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912582.

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

The square root of 250531081 is about 15828.1736470131. The cubic root of 250531081 is about 630.4062895342.

The spelling of 250531081 in words is "two hundred fifty million, five hundred thirty-one thousand, eighty-one".