25228022997 has 4 divisors (see below), whose sum is σ = 33637364000. Its totient is φ = 16818681996.

The previous prime is 25228022971. The next prime is 25228023011. The reversal of 25228022997 is 79922082252.

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 de Polignac number, because none of the positive numbers 2^k-25228022997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25228022497) 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, 4204670497 + ... + 4204670502.

It is an arithmetic number, because the mean of its divisors is an integer number (8409341000).

Almost surely, 2^25228022997 is an apocalyptic number.

It is an amenable number.

25228022997 is a deficient number, since it is larger than the sum of its proper divisors (8409341003).

25228022997 is an equidigital number, since it uses as much as digits as its factorization.

25228022997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8409341002.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 25228022997 in words is "twenty-five billion, two hundred twenty-eight million, twenty-two thousand, nine hundred ninety-seven".