25349531 has 2 divisors, whose sum is σ = 25349532. Its totient is φ = 25349530.

The previous prime is 25349503. The next prime is 25349543. The reversal of 25349531 is 13594352.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25349531 is a prime.

It is a super-2 number, since 2×25349531² = 1285197443839922, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25349501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12674765 + 12674766.

It is an arithmetic number, because the mean of its divisors is an integer number (12674766).

Almost surely, 2^25349531 is an apocalyptic number.

25349531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25349531 is an equidigital number, since it uses as much as digits as its factorization.

25349531 is an odious number, because the sum of its binary digits is odd.

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

The square root of 25349531 is about 5034.8317747468. The cubic root of 25349531 is about 293.7581850141.

The spelling of 25349531 in words is "twenty-five million, three hundred forty-nine thousand, five hundred thirty-one".