25221031422 has 16 divisors (see below), whose sum is σ = 50451335040. Its totient is φ = 8405465112.

The previous prime is 25221031421. The next prime is 25221031487. The reversal of 25221031422 is 22413012252.

It is a super-2 number, since 2×25221031422² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25221031392 and 25221031401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25221031421) 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 7 ways as a sum of consecutive naturals, for example, 350728 + ... + 416475.

It is an arithmetic number, because the mean of its divisors is an integer number (3153208440).

Almost surely, 2^25221031422 is an apocalyptic number.

25221031422 is an abundant number, since it is smaller than the sum of its proper divisors (25230303618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25221031422 is a wasteful number, since it uses less digits than its factorization.

25221031422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772687.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 25221031422 its reverse (22413012252), we get a palindrome (47634043674).

The spelling of 25221031422 in words is "twenty-five billion, two hundred twenty-one million, thirty-one thousand, four hundred twenty-two".