213456139 has 8 divisors (see below), whose sum is σ = 231687680. Its totient is φ = 195483456.

The previous prime is 213456091. The next prime is 213456151. The reversal of 213456139 is 931654312.

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 213456139 - 2¹³ = 213447947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213456239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62994 + ... + 66295.

It is an arithmetic number, because the mean of its divisors is an integer number (28960960).

Almost surely, 2^213456139 is an apocalyptic number.

213456139 is a deficient number, since it is larger than the sum of its proper divisors (18231541).

213456139 is a wasteful number, since it uses less digits than its factorization.

213456139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129429.

The product of its digits is 19440, while the sum is 34.

The square root of 213456139 is about 14610.1382265877. The cubic root of 213456139 is about 597.6352654429.

The spelling of 213456139 in words is "two hundred thirteen million, four hundred fifty-six thousand, one hundred thirty-nine".