213245542 has 8 divisors (see below), whose sum is σ = 323035632. Its totient is φ = 105567000.

The previous prime is 213245519. The next prime is 213245587. The reversal of 213245542 is 245542312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×213245542² = 90947322365747528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213245542.

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 3 ways as a sum of consecutive naturals, for example, 527634 + ... + 528037.

It is an arithmetic number, because the mean of its divisors is an integer number (40379454).

Almost surely, 2^213245542 is an apocalyptic number.

213245542 is a deficient number, since it is larger than the sum of its proper divisors (109790090).

213245542 is a wasteful number, since it uses less digits than its factorization.

213245542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055774.

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

The square root of 213245542 is about 14602.9292266997. The cubic root of 213245542 is about 597.4386573580.

Adding to 213245542 its reverse (245542312), we get a palindrome (458787854).

It can be divided in two parts, 2132 and 45542, that added together give a palindrome (47674).

The spelling of 213245542 in words is "two hundred thirteen million, two hundred forty-five thousand, five hundred forty-two".