3135221231 has 4 divisors (see below), whose sum is σ = 3164522472. Its totient is φ = 3105919992.

The previous prime is 3135221227. The next prime is 3135221269. The reversal of 3135221231 is 1321225313.

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 3135221231 - 2² = 3135221227 is a prime.

It is a super-2 number, since 2×3135221231² = 19659224334626310722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3135221197 and 3135221206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3135221281) 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, 14650460 + ... + 14650673.

It is an arithmetic number, because the mean of its divisors is an integer number (791130618).

Almost surely, 2^3135221231 is an apocalyptic number.

3135221231 is a deficient number, since it is larger than the sum of its proper divisors (29301241).

3135221231 is a wasteful number, since it uses less digits than its factorization.

3135221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29301240.

The product of its digits is 1080, while the sum is 23.

The square root of 3135221231 is about 55993.0462736222. The cubic root of 3135221231 is about 1463.6011109745.

Adding to 3135221231 its reverse (1321225313), we get a palindrome (4456446544).

The spelling of 3135221231 in words is "three billion, one hundred thirty-five million, two hundred twenty-one thousand, two hundred thirty-one".