213442690 has 16 divisors (see below), whose sum is σ = 384471360. Its totient is φ = 85316080.

The previous prime is 213442687. The next prime is 213442693. The reversal of 213442690 is 96244312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (213442687) and next prime (213442693).

It is a super-2 number, since 2×213442690² = 91115563828872200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213442693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8745 + ... + 22435.

It is an arithmetic number, because the mean of its divisors is an integer number (24029460).

Almost surely, 2^213442690 is an apocalyptic number.

213442690 is a deficient number, since it is larger than the sum of its proper divisors (171028670).

213442690 is a wasteful number, since it uses less digits than its factorization.

213442690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15257.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 213442690 is about 14609.6779567518. The cubic root of 213442690 is about 597.6227136598.

The spelling of 213442690 in words is "two hundred thirteen million, four hundred forty-two thousand, six hundred ninety".