213023131 has 2 divisors, whose sum is σ = 213023132. Its totient is φ = 213023130.

The previous prime is 213023123. The next prime is 213023143. The reversal of 213023131 is 131320312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213023131 - 2³ = 213023123 is a prime.

It is a super-2 number, since 2×213023131² = 90757708682086322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213023101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106511565 + 106511566.

It is an arithmetic number, because the mean of its divisors is an integer number (106511566).

Almost surely, 2^213023131 is an apocalyptic number.

213023131 is a deficient number, since it is larger than the sum of its proper divisors (1).

213023131 is an equidigital number, since it uses as much as digits as its factorization.

213023131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 213023131 is about 14595.3119528155. The cubic root of 213023131 is about 597.2308794277.

Adding to 213023131 its reverse (131320312), we get a palindrome (344343443).

The spelling of 213023131 in words is "two hundred thirteen million, twenty-three thousand, one hundred thirty-one".