25213031 has 2 divisors, whose sum is σ = 25213032. Its totient is φ = 25213030.

The previous prime is 25212997. The next prime is 25213033. The reversal of 25213031 is 13031252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25213031 is a prime.

It is a super-2 number, since 2×25213031² = 1271393864413922, which contains 22 as substring.

Together with 25213033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25213033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12606515 + 12606516.

It is an arithmetic number, because the mean of its divisors is an integer number (12606516).

Almost surely, 2^25213031 is an apocalyptic number.

25213031 is a deficient number, since it is larger than the sum of its proper divisors (1).

25213031 is an equidigital number, since it uses as much as digits as its factorization.

25213031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 25213031 is about 5021.2579101257. The cubic root of 25213031 is about 293.2299677410.

Adding to 25213031 its reverse (13031252), we get a palindrome (38244283).

The spelling of 25213031 in words is "twenty-five million, two hundred thirteen thousand, thirty-one".