25555144031231 has 4 divisors (see below), whose sum is σ = 27058387797792. Its totient is φ = 24051900264672.

The previous prime is 25555144031173. The next prime is 25555144031237. The reversal of 25555144031231 is 13213044155552.

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 25555144031231 - 2²² = 25555139836927 is a prime.

It is a super-2 number, since 2×25555144031231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25555144031237) 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, 751621883255 + ... + 751621883288.

It is an arithmetic number, because the mean of its divisors is an integer number (6764596949448).

Almost surely, 2^{25555144031231} is an apocalyptic number.

25555144031231 is a deficient number, since it is larger than the sum of its proper divisors (1503243766561).

25555144031231 is a wasteful number, since it uses less digits than its factorization.

25555144031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503243766560.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 25555144031231 its reverse (13213044155552), we get a palindrome (38768188186783).

The spelling of 25555144031231 in words is "twenty-five trillion, five hundred fifty-five billion, one hundred forty-four million, thirty-one thousand, two hundred thirty-one".