25252274442 has 16 divisors (see below), whose sum is σ = 50514825600. Its totient is φ = 8415712032.

The previous prime is 25252274429. The next prime is 25252274447. The reversal of 25252274442 is 24447225252.

It is a happy number.

It is a super-2 number, since 2×25252274442² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25252274442.

It is not an unprimeable number, because it can be changed into a prime (25252274447) 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, 396067 + ... + 455382.

It is an arithmetic number, because the mean of its divisors is an integer number (3157176600).

Almost surely, 2^25252274442 is an apocalyptic number.

25252274442 is an abundant number, since it is smaller than the sum of its proper divisors (25262551158).

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

25252274442 is a wasteful number, since it uses less digits than its factorization.

25252274442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856397.

The product of its digits is 358400, while the sum is 39.

Adding to 25252274442 its reverse (24447225252), we get a palindrome (49699499694).

The spelling of 25252274442 in words is "twenty-five billion, two hundred fifty-two million, two hundred seventy-four thousand, four hundred forty-two".