25221256627 has 24 divisors (see below), whose sum is σ = 31458144960. Its totient is φ = 20088956160.

The previous prime is 25221256609. The next prime is 25221256631. The reversal of 25221256627 is 72665212252.

It is a happy number.

It is not a de Polignac number, because 25221256627 - 2⁷ = 25221256499 is a prime.

It is a super-2 number, since 2×25221256627² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25221256627.

It is not an unprimeable number, because it can be changed into a prime (25221256667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125824 + ... + 257437.

It is an arithmetic number, because the mean of its divisors is an integer number (1310756040).

Almost surely, 2^25221256627 is an apocalyptic number.

25221256627 is a deficient number, since it is larger than the sum of its proper divisors (6236888333).

25221256627 is a wasteful number, since it uses less digits than its factorization.

25221256627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383371 (or 383364 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

Adding to 25221256627 its reverse (72665212252), we get a palindrome (97886468879).

The spelling of 25221256627 in words is "twenty-five billion, two hundred twenty-one million, two hundred fifty-six thousand, six hundred twenty-seven".