2215313131 has 4 divisors (see below), whose sum is σ = 2215421272. Its totient is φ = 2215204992.

The previous prime is 2215313123. The next prime is 2215313137. The reversal of 2215313131 is 1313135122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2215313131 - 2³ = 2215313123 is a prime.

It is a super-2 number, since 2×2215313131² = 9815224536762046322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2215313137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12885 + ... + 67798.

It is an arithmetic number, because the mean of its divisors is an integer number (553855318).

Almost surely, 2^2215313131 is an apocalyptic number.

2215313131 is a deficient number, since it is larger than the sum of its proper divisors (108141).

2215313131 is an equidigital number, since it uses as much as digits as its factorization.

2215313131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108140.

The product of its digits is 540, while the sum is 22.

The square root of 2215313131 is about 47067.1130514715. The cubic root of 2215313131 is about 1303.6020674934.

Adding to 2215313131 its reverse (1313135122), we get a palindrome (3528448253).

The spelling of 2215313131 in words is "two billion, two hundred fifteen million, three hundred thirteen thousand, one hundred thirty-one".