25513221124 has 12 divisors (see below), whose sum is σ = 45598097664. Its totient is φ = 12485193224.

The previous prime is 25513221113. The next prime is 25513221131. The reversal of 25513221124 is 42112231552.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25513221092 and 25513221101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67854124 + ... + 67854499.

It is an arithmetic number, because the mean of its divisors is an integer number (3799841472).

Almost surely, 2^25513221124 is an apocalyptic number.

It is an amenable number.

25513221124 is a deficient number, since it is larger than the sum of its proper divisors (20084876540).

25513221124 is a wasteful number, since it uses less digits than its factorization.

25513221124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135708674 (or 135708672 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

Adding to 25513221124 its reverse (42112231552), we get a palindrome (67625452676).

The spelling of 25513221124 in words is "twenty-five billion, five hundred thirteen million, two hundred twenty-one thousand, one hundred twenty-four".