213211139 has 2 divisors, whose sum is σ = 213211140. Its totient is φ = 213211138.

The previous prime is 213211099. The next prime is 213211151. The reversal of 213211139 is 931112312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213211139 is a prime.

It is not a weakly prime, because it can be changed into another prime (213211169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106605569 + 106605570.

It is an arithmetic number, because the mean of its divisors is an integer number (106605570).

Almost surely, 2^213211139 is an apocalyptic number.

213211139 is a deficient number, since it is larger than the sum of its proper divisors (1).

213211139 is an equidigital number, since it uses as much as digits as its factorization.

213211139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 23.

The square root of 213211139 is about 14601.7512305887. The cubic root of 213211139 is about 597.4065272802.

The spelling of 213211139 in words is "two hundred thirteen million, two hundred eleven thousand, one hundred thirty-nine".