249132431 has 4 divisors (see below), whose sum is σ = 249300792. Its totient is φ = 248964072.

The previous prime is 249132413. The next prime is 249132451. The reversal of 249132431 is 134231942.

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-249132431 is a prime.

It is a super-2 number, since 2×249132431² = 124133936351939522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249132394 and 249132403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249132451) 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, 81941 + ... + 84926.

It is an arithmetic number, because the mean of its divisors is an integer number (62325198).

Almost surely, 2^249132431 is an apocalyptic number.

249132431 is a deficient number, since it is larger than the sum of its proper divisors (168361).

249132431 is a wasteful number, since it uses less digits than its factorization.

249132431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168360.

The product of its digits is 5184, while the sum is 29.

The square root of 249132431 is about 15783.9295170753. The cubic root of 249132431 is about 629.2309680774.

The spelling of 249132431 in words is "two hundred forty-nine million, one hundred thirty-two thousand, four hundred thirty-one".