25431241242 has 16 divisors (see below), whose sum is σ = 55486344672. Its totient is φ = 7706436720.

The previous prime is 25431241219. The next prime is 25431241309. The reversal of 25431241242 is 24214213452.

It is a happy number.

It is a super-2 number, since 2×25431241242² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192660853 + ... + 192660984.

It is an arithmetic number, because the mean of its divisors is an integer number (3467896542).

Almost surely, 2^25431241242 is an apocalyptic number.

25431241242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25431241242 is an abundant number, since it is smaller than the sum of its proper divisors (30055103430).

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

25431241242 is a wasteful number, since it uses less digits than its factorization.

25431241242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385321853.

The product of its digits is 15360, while the sum is 30.

Adding to 25431241242 its reverse (24214213452), we get a palindrome (49645454694).

The spelling of 25431241242 in words is "twenty-five billion, four hundred thirty-one million, two hundred forty-one thousand, two hundred forty-two".