213556542 has 32 divisors (see below), whose sum is σ = 452860800. Its totient is φ = 66948768.

The previous prime is 213556529. The next prime is 213556571. The reversal of 213556542 is 245655312.

It is a congruent number.

It is an unprimeable number.

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, 9108 + ... + 22584.

It is an arithmetic number, because the mean of its divisors is an integer number (14151900).

Almost surely, 2^213556542 is an apocalyptic number.

213556542 is an abundant number, since it is smaller than the sum of its proper divisors (239304258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213556542 is a wasteful number, since it uses less digits than its factorization.

213556542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13640.

The product of its digits is 36000, while the sum is 33.

The square root of 213556542 is about 14613.5738955260. The cubic root of 213556542 is about 597.7289536486.

The spelling of 213556542 in words is "two hundred thirteen million, five hundred fifty-six thousand, five hundred forty-two".