25222931867161 has 4 divisors (see below), whose sum is σ = 28826207848192. Its totient is φ = 21619655886132.

The previous prime is 25222931867141. The next prime is 25222931867173. The reversal of 25222931867161 is 16176813922252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25222931867161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25222931867141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1801637990505 + ... + 1801637990518.

It is an arithmetic number, because the mean of its divisors is an integer number (7206551962048).

Almost surely, 2^{25222931867161} is an apocalyptic number.

It is an amenable number.

25222931867161 is a deficient number, since it is larger than the sum of its proper divisors (3603275981031).

25222931867161 is an equidigital number, since it uses as much as digits as its factorization.

25222931867161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603275981030.

The product of its digits is 4354560, while the sum is 55.

The spelling of 25222931867161 in words is "twenty-five trillion, two hundred twenty-two billion, nine hundred thirty-one million, eight hundred sixty-seven thousand, one hundred sixty-one".