213353431 has 2 divisors, whose sum is σ = 213353432. Its totient is φ = 213353430.

The previous prime is 213353419. The next prime is 213353453. The reversal of 213353431 is 134353312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213353431 is a prime.

It is a super-2 number, since 2×213353431² = 91039373038943522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213353396 and 213353405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213353531) 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 as a sum of consecutive naturals, namely, 106676715 + 106676716.

It is an arithmetic number, because the mean of its divisors is an integer number (106676716).

Almost surely, 2^213353431 is an apocalyptic number.

213353431 is a deficient number, since it is larger than the sum of its proper divisors (1).

213353431 is an equidigital number, since it uses as much as digits as its factorization.

213353431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 25.

The square root of 213353431 is about 14606.6228471882. The cubic root of 213353431 is about 597.5393959890.

The spelling of 213353431 in words is "two hundred thirteen million, three hundred fifty-three thousand, four hundred thirty-one".