25220507 has 8 divisors (see below), whose sum is σ = 27325536. Its totient is φ = 23139072.

The previous prime is 25220491. The next prime is 25220521. The reversal of 25220507 is 70502252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25220507 - 2⁴ = 25220491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25220557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3638 + ... + 7979.

It is an arithmetic number, because the mean of its divisors is an integer number (3415692).

Almost surely, 2^25220507 is an apocalyptic number.

25220507 is a deficient number, since it is larger than the sum of its proper divisors (2105029).

25220507 is a wasteful number, since it uses less digits than its factorization.

25220507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11797.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 25220507 is about 5022.0022899238. The cubic root of 25220507 is about 293.2589470758.

Subtracting from 25220507 its sum of digits (23), we obtain a square (25220484 = 5022²).

Adding to 25220507 its reverse (70502252), we get a palindrome (95722759).

The spelling of 25220507 in words is "twenty-five million, two hundred twenty thousand, five hundred seven".