131133311 has 4 divisors (see below), whose sum is σ = 131166624. Its totient is φ = 131100000.

The previous prime is 131133287. The next prime is 131133329. The reversal of 131133311 is 113331131.

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 131133311 - 2²⁶ = 64024447 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 131133311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131133371) 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, 9815 + ... + 18936.

It is an arithmetic number, because the mean of its divisors is an integer number (32791656).

Almost surely, 2^131133311 is an apocalyptic number.

131133311 is a deficient number, since it is larger than the sum of its proper divisors (33313).

131133311 is an equidigital number, since it uses as much as digits as its factorization.

131133311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33312.

The product of its digits is 81, while the sum is 17.

The square root of 131133311 is about 11451.3453794740. The cubic root of 131133311 is about 508.0475276900.

Adding to 131133311 its reverse (113331131), we get a palindrome (244464442).

The spelling of 131133311 in words is "one hundred thirty-one million, one hundred thirty-three thousand, three hundred eleven".