213142334 has 16 divisors (see below), whose sum is σ = 338189472. Its totient is φ = 100539648.

The previous prime is 213142297. The next prime is 213142339. The reversal of 213142334 is 433241312.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213142339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28379 + ... + 35094.

It is an arithmetic number, because the mean of its divisors is an integer number (21136842).

Almost surely, 2^213142334 is an apocalyptic number.

213142334 is a deficient number, since it is larger than the sum of its proper divisors (125047138).

213142334 is a wasteful number, since it uses less digits than its factorization.

213142334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63571.

The product of its digits is 1728, while the sum is 23.

The square root of 213142334 is about 14599.3949874644. The cubic root of 213142334 is about 597.3422576886.

Adding to 213142334 its reverse (433241312), we get a palindrome (646383646).

The spelling of 213142334 in words is "two hundred thirteen million, one hundred forty-two thousand, three hundred thirty-four".