25222031 has 2 divisors, whose sum is σ = 25222032. Its totient is φ = 25222030.

The previous prime is 25222019. The next prime is 25222051. The reversal of 25222031 is 13022252.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25222031 is a prime.

It is a super-2 number, since 2×25222031² = 1272301695529922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25222051) 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, 12611015 + 12611016.

It is an arithmetic number, because the mean of its divisors is an integer number (12611016).

Almost surely, 2^25222031 is an apocalyptic number.

25222031 is a deficient number, since it is larger than the sum of its proper divisors (1).

25222031 is an equidigital number, since it uses as much as digits as its factorization.

25222031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 25222031 is about 5022.1540199400. The cubic root of 25222031 is about 293.2648538779.

Adding to 25222031 its reverse (13022252), we get a palindrome (38244283).

The spelling of 25222031 in words is "twenty-five million, two hundred twenty-two thousand, thirty-one".