213212342 has 16 divisors (see below), whose sum is σ = 365707680. Its totient is φ = 91326528.

The previous prime is 213212339. The next prime is 213212347. The reversal of 213212342 is 243212312.

It is a super-2 number, since 2×213212342² = 90919005562249928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213212347) 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, 34634 + ... + 40322.

It is an arithmetic number, because the mean of its divisors is an integer number (22856730).

Almost surely, 2^213212342 is an apocalyptic number.

213212342 is a deficient number, since it is larger than the sum of its proper divisors (152495338).

213212342 is a wasteful number, since it uses less digits than its factorization.

213212342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8375.

The product of its digits is 576, while the sum is 20.

The square root of 213212342 is about 14601.7924242197. The cubic root of 213212342 is about 597.4076508592.

Adding to 213212342 its reverse (243212312), we get a palindrome (456424654).

The spelling of 213212342 in words is "two hundred thirteen million, two hundred twelve thousand, three hundred forty-two".