25222779 has 16 divisors (see below), whose sum is σ = 38656800. Its totient is φ = 16234848.

The previous prime is 25222777. The next prime is 25222793. The reversal of 25222779 is 97722252.

It is not a de Polignac number, because 25222779 - 2¹ = 25222777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25222777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15324 + ... + 16889.

It is an arithmetic number, because the mean of its divisors is an integer number (2416050).

Almost surely, 2^25222779 is an apocalyptic number.

25222779 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

25222779 is a deficient number, since it is larger than the sum of its proper divisors (13434021).

25222779 is a wasteful number, since it uses less digits than its factorization.

25222779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32251 (or 32245 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 25222779 is about 5022.2284894258. The cubic root of 25222779 is about 293.2677529300.

The spelling of 25222779 in words is "twenty-five million, two hundred twenty-two thousand, seven hundred seventy-nine".