213065431 has 2 divisors, whose sum is σ = 213065432. Its totient is φ = 213065430.

The previous prime is 213065357. The next prime is 213065443. The reversal of 213065431 is 134560312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213065431 - 2¹³ = 213057239 is a prime.

It is a super-2 number, since 2×213065431² = 90793755774431522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213065396 and 213065405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213065231) 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, 106532715 + 106532716.

It is an arithmetic number, because the mean of its divisors is an integer number (106532716).

Almost surely, 2^213065431 is an apocalyptic number.

213065431 is a deficient number, since it is larger than the sum of its proper divisors (1).

213065431 is an equidigital number, since it uses as much as digits as its factorization.

213065431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 213065431 is about 14596.7609763262. The cubic root of 213065431 is about 597.2704075205.

The spelling of 213065431 in words is "two hundred thirteen million, sixty-five thousand, four hundred thirty-one".