25131522 has 64 divisors (see below), whose sum is σ = 56770560. Its totient is φ = 7366464.

The previous prime is 25131521. The next prime is 25131523. The reversal of 25131522 is 22513152.

It is an interprime number because it is at equal distance from previous prime (25131521) and next prime (25131523).

It is not an unprimeable number, because it can be changed into a prime (25131521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197823 + ... + 197949.

It is an arithmetic number, because the mean of its divisors is an integer number (887040).

Almost surely, 2^25131522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25131522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28385280).

25131522 is an abundant number, since it is smaller than the sum of its proper divisors (31639038).

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

25131522 is a wasteful number, since it uses less digits than its factorization.

25131522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247.

The product of its digits is 600, while the sum is 21.

The square root of 25131522 is about 5013.1349473159. The cubic root of 25131522 is about 292.9136407923.

Adding to 25131522 its reverse (22513152), we get a palindrome (47644674).

The spelling of 25131522 in words is "twenty-five million, one hundred thirty-one thousand, five hundred twenty-two".