213255442 has 4 divisors (see below), whose sum is σ = 319883166. Its totient is φ = 106627720.

The previous prime is 213255437. The next prime is 213255491. The reversal of 213255442 is 244552312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 210569121 + 2686321 = 14511^2 + 1639^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213255442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53313859 + ... + 53313862.

Almost surely, 2^213255442 is an apocalyptic number.

213255442 is a deficient number, since it is larger than the sum of its proper divisors (106627724).

213255442 is a wasteful number, since it uses less digits than its factorization.

213255442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106627723.

The product of its digits is 9600, while the sum is 28.

The square root of 213255442 is about 14603.2681958526. The cubic root of 213255442 is about 597.4479026488.

The spelling of 213255442 in words is "two hundred thirteen million, two hundred fifty-five thousand, four hundred forty-two".