213312442 has 32 divisors (see below), whose sum is σ = 382516992. Its totient is φ = 87229824.

The previous prime is 213312431. The next prime is 213312443. The reversal of 213312442 is 244213312.

It is not an unprimeable number, because it can be changed into a prime (213312443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248478 + ... + 249334.

It is an arithmetic number, because the mean of its divisors is an integer number (11953656).

Almost surely, 2^213312442 is an apocalyptic number.

213312442 is a deficient number, since it is larger than the sum of its proper divisors (169204550).

213312442 is a wasteful number, since it uses less digits than its factorization.

213312442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662.

The product of its digits is 1152, while the sum is 22.

The square root of 213312442 is about 14605.2196833872. The cubic root of 213312442 is about 597.5011275458.

Adding to 213312442 its reverse (244213312), we get a palindrome (457525754).

The spelling of 213312442 in words is "two hundred thirteen million, three hundred twelve thousand, four hundred forty-two".