249425131 has 2 divisors, whose sum is σ = 249425132. Its totient is φ = 249425130.

The previous prime is 249425117. The next prime is 249425147. The reversal of 249425131 is 131524942.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249425131 is a prime.

It is a super-2 number, since 2×249425131² = 124425791948734322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 249425093 and 249425102.

It is not a weakly prime, because it can be changed into another prime (249425171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124712565 + 124712566.

It is an arithmetic number, because the mean of its divisors is an integer number (124712566).

Almost surely, 2^249425131 is an apocalyptic number.

249425131 is a deficient number, since it is larger than the sum of its proper divisors (1).

249425131 is an equidigital number, since it uses as much as digits as its factorization.

249425131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 249425131 is about 15793.1988843299. The cubic root of 249425131 is about 629.4772946631.

The spelling of 249425131 in words is "two hundred forty-nine million, four hundred twenty-five thousand, one hundred thirty-one".