213332831 has 2 divisors, whose sum is σ = 213332832. Its totient is φ = 213332830.

The previous prime is 213332809. The next prime is 213332839. The reversal of 213332831 is 138233312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213332831 is a prime.

It is a super-2 number, since 2×213332831² = 91021793564949122, 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 213332831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213332839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106666415 + 106666416.

It is an arithmetic number, because the mean of its divisors is an integer number (106666416).

Almost surely, 2^213332831 is an apocalyptic number.

213332831 is a deficient number, since it is larger than the sum of its proper divisors (1).

213332831 is an equidigital number, since it uses as much as digits as its factorization.

213332831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 26.

The square root of 213332831 is about 14605.9176705882. The cubic root of 213332831 is about 597.5201638825.

The spelling of 213332831 in words is "two hundred thirteen million, three hundred thirty-two thousand, eight hundred thirty-one".