213580997 has 4 divisors (see below), whose sum is σ = 244092576. Its totient is φ = 183069420.

The previous prime is 213580987. The next prime is 213581029. The reversal of 213580997 is 799085312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213580997 - 2⁶ = 213580933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213580987) 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 in 3 ways as a sum of consecutive naturals, for example, 15255779 + ... + 15255792.

It is an arithmetic number, because the mean of its divisors is an integer number (61023144).

Almost surely, 2^213580997 is an apocalyptic number.

It is an amenable number.

213580997 is a deficient number, since it is larger than the sum of its proper divisors (30511579).

213580997 is an equidigital number, since it uses as much as digits as its factorization.

213580997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30511578.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 213580997 is about 14614.4105936572. The cubic root of 213580997 is about 597.7517686894.

The spelling of 213580997 in words is "two hundred thirteen million, five hundred eighty thousand, nine hundred ninety-seven".