25222149220 has 12 divisors (see below), whose sum is σ = 52966513404. Its totient is φ = 10088859680.

The previous prime is 25222149217. The next prime is 25222149221. The reversal of 25222149220 is 2294122252.

It can be written as a sum of positive squares in 2 ways, for example, as 7836144484 + 17386004736 = 88522^2 + 131856^2 .

It is a super-2 number, since 2×25222149220² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25222149221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630553711 + ... + 630553750.

It is an arithmetic number, because the mean of its divisors is an integer number (4413876117).

Almost surely, 2^25222149220 is an apocalyptic number.

25222149220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25222149220 is an abundant number, since it is smaller than the sum of its proper divisors (27744364184).

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

25222149220 is a wasteful number, since it uses less digits than its factorization.

25222149220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261107470 (or 1261107468 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 25222149220 in words is "twenty-five billion, two hundred twenty-two million, one hundred forty-nine thousand, two hundred twenty".