213456091 has 2 divisors, whose sum is σ = 213456092. Its totient is φ = 213456090.

The previous prime is 213456053. The next prime is 213456151. The reversal of 213456091 is 190654312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213456091 - 2⁹ = 213455579 is a prime.

It is not a weakly prime, because it can be changed into another prime (213457091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106728045 + 106728046.

It is an arithmetic number, because the mean of its divisors is an integer number (106728046).

Almost surely, 2^213456091 is an apocalyptic number.

213456091 is a deficient number, since it is larger than the sum of its proper divisors (1).

213456091 is an equidigital number, since it uses as much as digits as its factorization.

213456091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 213456091 is about 14610.1365838927. The cubic root of 213456091 is about 597.6352206461.

The spelling of 213456091 in words is "two hundred thirteen million, four hundred fifty-six thousand, ninety-one".