249035531 has 2 divisors, whose sum is σ = 249035532. Its totient is φ = 249035530.

The previous prime is 249035509. The next prime is 249035543. The reversal of 249035531 is 135530942.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249035531 is a prime.

It is a super-2 number, since 2×249035531² = 124037391400903922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (249035131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124517765 + 124517766.

It is an arithmetic number, because the mean of its divisors is an integer number (124517766).

Almost surely, 2^249035531 is an apocalyptic number.

249035531 is a deficient number, since it is larger than the sum of its proper divisors (1).

249035531 is an equidigital number, since it uses as much as digits as its factorization.

249035531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 249035531 is about 15780.8596407167. The cubic root of 249035531 is about 629.1493777530.

The spelling of 249035531 in words is "two hundred forty-nine million, thirty-five thousand, five hundred thirty-one".