25220323331 has 8 divisors (see below), whose sum is σ = 30076410624. Its totient is φ = 20677532040.

The previous prime is 25220323277. The next prime is 25220323333. The reversal of 25220323331 is 13332302252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25220323331 is a prime.

It is a super-2 number, since 2×25220323331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25220323331.

It is not an unprimeable number, because it can be changed into a prime (25220323333) 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, 78323825 + ... + 78324146.

It is an arithmetic number, because the mean of its divisors is an integer number (3759551328).

Almost surely, 2^25220323331 is an apocalyptic number.

25220323331 is a deficient number, since it is larger than the sum of its proper divisors (4856087293).

25220323331 is a wasteful number, since it uses less digits than its factorization.

25220323331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156648001.

The product of its (nonzero) digits is 6480, while the sum is 26.

Adding to 25220323331 its reverse (13332302252), we get a palindrome (38552625583).

The spelling of 25220323331 in words is "twenty-five billion, two hundred twenty million, three hundred twenty-three thousand, three hundred thirty-one".