25331303231 has 4 divisors (see below), whose sum is σ = 27279865032. Its totient is φ = 23382741432.

The previous prime is 25331303213. The next prime is 25331303267. The reversal of 25331303231 is 13230313352.

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 25331303231 - 2¹⁰ = 25331302207 is a prime.

It is a super-2 number, since 2×25331303231² (a number of 22 digits) contains 22 as substring.

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 25331303231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25331303281) 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, 974280881 + ... + 974280906.

It is an arithmetic number, because the mean of its divisors is an integer number (6819966258).

Almost surely, 2^25331303231 is an apocalyptic number.

25331303231 is a deficient number, since it is larger than the sum of its proper divisors (1948561801).

25331303231 is a wasteful number, since it uses less digits than its factorization.

25331303231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948561800.

The product of its (nonzero) digits is 4860, while the sum is 26.

Adding to 25331303231 its reverse (13230313352), we get a palindrome (38561616583).

The spelling of 25331303231 in words is "twenty-five billion, three hundred thirty-one million, three hundred three thousand, two hundred thirty-one".