249143431 has 2 divisors, whose sum is σ = 249143432. Its totient is φ = 249143430.

The previous prime is 249143359. The next prime is 249143441. The reversal of 249143431 is 134341942.

249143431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249143431 - 2⁷ = 249143303 is a prime.

It is a super-2 number, since 2×249143431² = 124144898420903522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 249143393 and 249143402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249143441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124571715 + 124571716.

It is an arithmetic number, because the mean of its divisors is an integer number (124571716).

Almost surely, 2^249143431 is an apocalyptic number.

249143431 is a deficient number, since it is larger than the sum of its proper divisors (1).

249143431 is an equidigital number, since it uses as much as digits as its factorization.

249143431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 249143431 is about 15784.2779689158. The cubic root of 249143431 is about 629.2402287997.

The spelling of 249143431 in words is "two hundred forty-nine million, one hundred forty-three thousand, four hundred thirty-one".