25553320223 has 4 divisors (see below), whose sum is σ = 26147583528. Its totient is φ = 24959056920.

The previous prime is 25553320207. The next prime is 25553320291. The reversal of 25553320223 is 32202335552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25553320223 - 2⁴ = 25553320207 is a prime.

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 25553320223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25553320123) 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, 297131588 + ... + 297131673.

It is an arithmetic number, because the mean of its divisors is an integer number (6536895882).

Almost surely, 2^25553320223 is an apocalyptic number.

25553320223 is a deficient number, since it is larger than the sum of its proper divisors (594263305).

25553320223 is an equidigital number, since it uses as much as digits as its factorization.

25553320223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594263304.

The product of its (nonzero) digits is 54000, while the sum is 32.

Adding to 25553320223 its reverse (32202335552), we get a palindrome (57755655775).

The spelling of 25553320223 in words is "twenty-five billion, five hundred fifty-three million, three hundred twenty thousand, two hundred twenty-three".