25220323215 has 40 divisors (see below), whose sum is σ = 46062818208. Its totient is φ = 13197038400.

The previous prime is 25220323211. The next prime is 25220323217. The reversal of 25220323215 is 51232302252.

It is not a de Polignac number, because 25220323215 - 2² = 25220323211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25220323211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 566011 + ... + 608940.

Almost surely, 2^25220323215 is an apocalyptic number.

25220323215 is a deficient number, since it is larger than the sum of its proper divisors (20842494993).

25220323215 is a wasteful number, since it uses less digits than its factorization.

25220323215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175021 (or 1175012 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 25220323215 its reverse (51232302252), we get a palindrome (76452625467).

The spelling of 25220323215 in words is "twenty-five billion, two hundred twenty million, three hundred twenty-three thousand, two hundred fifteen".