212323442 has 32 divisors (see below), whose sum is σ = 361929600. Its totient is φ = 92873088.

The previous prime is 212323439. The next prime is 212323453. The reversal of 212323442 is 244323212.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21158 + ... + 29534.

It is an arithmetic number, because the mean of its divisors is an integer number (11310300).

Almost surely, 2^212323442 is an apocalyptic number.

212323442 is a deficient number, since it is larger than the sum of its proper divisors (149606158).

212323442 is a wasteful number, since it uses less digits than its factorization.

212323442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8450.

The product of its digits is 2304, while the sum is 23.

The square root of 212323442 is about 14571.3225892504. The cubic root of 212323442 is about 596.5762803623.

Adding to 212323442 its reverse (244323212), we get a palindrome (456646654).

The spelling of 212323442 in words is "two hundred twelve million, three hundred twenty-three thousand, four hundred forty-two".