213587641 has 2 divisors, whose sum is σ = 213587642. Its totient is φ = 213587640.

The previous prime is 213587603. The next prime is 213587659. The reversal of 213587641 is 146785312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212547241 + 1040400 = 14579^2 + 1020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213587641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213587641.

It is not a weakly prime, because it can be changed into another prime (213587681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106793820 + 106793821.

It is an arithmetic number, because the mean of its divisors is an integer number (106793821).

Almost surely, 2^213587641 is an apocalyptic number.

It is an amenable number.

213587641 is a deficient number, since it is larger than the sum of its proper divisors (1).

213587641 is an equidigital number, since it uses as much as digits as its factorization.

213587641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 213587641 is about 14614.6379017751. The cubic root of 213587641 is about 597.7579668400.

The spelling of 213587641 in words is "two hundred thirteen million, five hundred eighty-seven thousand, six hundred forty-one".