249950131 has 4 divisors (see below), whose sum is σ = 260817552. Its totient is φ = 239082712.

The previous prime is 249950081. The next prime is 249950143. The reversal of 249950131 is 131059942.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249950131 is a prime.

It is a super-2 number, since 2×249950131² = 124950135973834322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249950161) 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, 5433676 + ... + 5433721.

It is an arithmetic number, because the mean of its divisors is an integer number (65204388).

Almost surely, 2^249950131 is an apocalyptic number.

249950131 is a deficient number, since it is larger than the sum of its proper divisors (10867421).

249950131 is a wasteful number, since it uses less digits than its factorization.

249950131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10867420.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 249950131 is about 15809.8112259445. The cubic root of 249950131 is about 629.9186348267.

The spelling of 249950131 in words is "two hundred forty-nine million, nine hundred fifty thousand, one hundred thirty-one".