25331400231 has 4 divisors (see below), whose sum is σ = 33775200312. Its totient is φ = 16887600152.

The previous prime is 25331400161. The next prime is 25331400251. The reversal of 25331400231 is 13200413352.

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 25331400231 - 2¹⁸ = 25331138087 is a prime.

It is a super-2 number, since 2×25331400231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25331400251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4221900036 + ... + 4221900041.

It is an arithmetic number, because the mean of its divisors is an integer number (8443800078).

Almost surely, 2^25331400231 is an apocalyptic number.

25331400231 is a deficient number, since it is larger than the sum of its proper divisors (8443800081).

25331400231 is an equidigital number, since it uses as much as digits as its factorization.

25331400231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8443800080.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 25331400231 its reverse (13200413352), we get a palindrome (38531813583).

The spelling of 25331400231 in words is "twenty-five billion, three hundred thirty-one million, four hundred thousand, two hundred thirty-one".