213365990 has 16 divisors (see below), whose sum is σ = 384546960. Its totient is φ = 85237920.

The previous prime is 213365987. The next prime is 213365993. The reversal of 213365990 is 99563312.

It is an interprime number because it is at equal distance from previous prime (213365987) and next prime (213365993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213365993) 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 7 ways as a sum of consecutive naturals, for example, 5045 + ... + 21264.

It is an arithmetic number, because the mean of its divisors is an integer number (24034185).

Almost surely, 2^213365990 is an apocalyptic number.

213365990 is a deficient number, since it is larger than the sum of its proper divisors (171180970).

213365990 is a wasteful number, since it uses less digits than its factorization.

213365990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27127.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 213365990 is about 14607.0527485869. The cubic root of 213365990 is about 597.5511204314.

The spelling of 213365990 in words is "two hundred thirteen million, three hundred sixty-five thousand, nine hundred ninety".