213242539 has 8 divisors (see below), whose sum is σ = 220829760. Its totient is φ = 205670976.

The previous prime is 213242537. The next prime is 213242551. The reversal of 213242539 is 935242312.

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

It is a cyclic number.

It is not a de Polignac number, because 213242539 - 2¹ = 213242537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213242539.

It is not an unprimeable number, because it can be changed into a prime (213242531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28462 + ... + 35164.

It is an arithmetic number, because the mean of its divisors is an integer number (27603720).

Almost surely, 2^213242539 is an apocalyptic number.

213242539 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

213242539 is a deficient number, since it is larger than the sum of its proper divisors (7587221).

213242539 is a wasteful number, since it uses less digits than its factorization.

213242539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7829.

The product of its digits is 12960, while the sum is 31.

The square root of 213242539 is about 14602.8264045013. The cubic root of 213242539 is about 597.4358528965.

The spelling of 213242539 in words is "two hundred thirteen million, two hundred forty-two thousand, five hundred thirty-nine".