213012234 has 16 divisors (see below), whose sum is σ = 473360640. Its totient is φ = 71004060.

The previous prime is 213012209. The next prime is 213012259. The reversal of 213012234 is 432210312.

It is an interprime number because it is at equal distance from previous prime (213012209) and next prime (213012259).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1972282 + ... + 1972389.

It is an arithmetic number, because the mean of its divisors is an integer number (29585040).

Almost surely, 2^213012234 is an apocalyptic number.

213012234 is an abundant number, since it is smaller than the sum of its proper divisors (260348406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213012234 is a wasteful number, since it uses less digits than its factorization.

213012234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944682 (or 3944676 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 213012234 is about 14594.9386432420. The cubic root of 213012234 is about 597.2206956575.

Adding to 213012234 its reverse (432210312), we get a palindrome (645222546).

The spelling of 213012234 in words is "two hundred thirteen million, twelve thousand, two hundred thirty-four".