25222523121 has 16 divisors (see below), whose sum is σ = 37416092800. Its totient is φ = 16792789104.

The previous prime is 25222523113. The next prime is 25222523159. The reversal of 25222523121 is 12132522252.

It is not a de Polignac number, because 25222523121 - 2³ = 25222523113 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25222523621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596581 + ... + 637458.

It is an arithmetic number, because the mean of its divisors is an integer number (2338505800).

Almost surely, 2^25222523121 is an apocalyptic number.

It is an amenable number.

25222523121 is a deficient number, since it is larger than the sum of its proper divisors (12193569679).

25222523121 is a wasteful number, since it uses less digits than its factorization.

25222523121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234805 (or 1234799 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The spelling of 25222523121 in words is "twenty-five billion, two hundred twenty-two million, five hundred twenty-three thousand, one hundred twenty-one".