213131299 has 2 divisors, whose sum is σ = 213131300. Its totient is φ = 213131298.

The previous prime is 213131291. The next prime is 213131309. The reversal of 213131299 is 992131312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213131299 - 2³ = 213131291 is a prime.

It is a super-2 number, since 2×213131299² = 90849901226854802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213131299.

It is not a weakly prime, because it can be changed into another prime (213131291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565649 + 106565650.

It is an arithmetic number, because the mean of its divisors is an integer number (106565650).

Almost surely, 2^213131299 is an apocalyptic number.

213131299 is a deficient number, since it is larger than the sum of its proper divisors (1).

213131299 is an equidigital number, since it uses as much as digits as its factorization.

213131299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 31.

The square root of 213131299 is about 14599.0170559528. The cubic root of 213131299 is about 597.3319487940.

The spelling of 213131299 in words is "two hundred thirteen million, one hundred thirty-one thousand, two hundred ninety-nine".