25222660 has 12 divisors (see below), whose sum is σ = 52967628. Its totient is φ = 10089056.

The previous prime is 25222649. The next prime is 25222661. The reversal of 25222660 is 6622252.

It can be written as a sum of positive squares in 2 ways, for example, as 20142144 + 5080516 = 4488^2 + 2254^2 .

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (25222661) 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, 630547 + ... + 630586.

It is an arithmetic number, because the mean of its divisors is an integer number (4413969).

Almost surely, 2^25222660 is an apocalyptic number.

25222660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25222660 is an abundant number, since it is smaller than the sum of its proper divisors (27744968).

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

25222660 is a wasteful number, since it uses less digits than its factorization.

25222660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261142 (or 1261140 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 25222660 is about 5022.2166420815. The cubic root of 25222660 is about 293.2672917210.

The spelling of 25222660 in words is "twenty-five million, two hundred twenty-two thousand, six hundred sixty".