25531381324 has 6 divisors (see below), whose sum is σ = 44679917324. Its totient is φ = 12765690660.

The previous prime is 25531381307. The next prime is 25531381327. The reversal of 25531381324 is 42318313552.

It is a happy number.

It is a super-2 number, since 2×25531381324² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25531381327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3191422662 + ... + 3191422669.

Almost surely, 2^25531381324 is an apocalyptic number.

It is an amenable number.

25531381324 is a deficient number, since it is larger than the sum of its proper divisors (19148536000).

25531381324 is a wasteful number, since it uses less digits than its factorization.

25531381324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6382845335 (or 6382845333 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

Adding to 25531381324 its reverse (42318313552), we get a palindrome (67849694876).

The spelling of 25531381324 in words is "twenty-five billion, five hundred thirty-one million, three hundred eighty-one thousand, three hundred twenty-four".