213075931 has 2 divisors, whose sum is σ = 213075932. Its totient is φ = 213075930.

The previous prime is 213075881. The next prime is 213076009. The reversal of 213075931 is 139570312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213075931 - 2¹⁵ = 213043163 is a prime.

It is a super-2 number, since 2×213075931² = 90802704743033522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213075893 and 213075902.

It is not a weakly prime, because it can be changed into another prime (213070931) 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, 106537965 + 106537966.

It is an arithmetic number, because the mean of its divisors is an integer number (106537966).

Almost surely, 2^213075931 is an apocalyptic number.

213075931 is a deficient number, since it is larger than the sum of its proper divisors (1).

213075931 is an equidigital number, since it uses as much as digits as its factorization.

213075931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 213075931 is about 14597.1206407291. The cubic root of 213075931 is about 597.2802186479.

The spelling of 213075931 in words is "two hundred thirteen million, seventy-five thousand, nine hundred thirty-one".