25222501 has 4 divisors (see below), whose sum is σ = 25350732. Its totient is φ = 25094272.

The previous prime is 25222471. The next prime is 25222529. The reversal of 25222501 is 10522252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19793601 + 5428900 = 4449^2 + 2330^2 .

It is a cyclic number.

It is not a de Polignac number, because 25222501 - 2⁵ = 25222469 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25223501) 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, 63820 + ... + 64213.

It is an arithmetic number, because the mean of its divisors is an integer number (6337683).

Almost surely, 2^25222501 is an apocalyptic number.

It is an amenable number.

25222501 is a deficient number, since it is larger than the sum of its proper divisors (128231).

25222501 is a wasteful number, since it uses less digits than its factorization.

25222501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128230.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 25222501 is about 5022.2008123929. The cubic root of 25222501 is about 293.2666754815.

Adding to 25222501 its reverse (10522252), we get a palindrome (35744753).

The spelling of 25222501 in words is "twenty-five million, two hundred twenty-two thousand, five hundred one".