213720624539 has 2 divisors, whose sum is σ = 213720624540. Its totient is φ = 213720624538.

The previous prime is 213720624521. The next prime is 213720624581. The reversal of 213720624539 is 935426027312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213720624539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213720624539.

It is not a weakly prime, because it can be changed into another prime (213720614539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106860312269 + 106860312270.

It is an arithmetic number, because the mean of its divisors is an integer number (106860312270).

Almost surely, 2^213720624539 is an apocalyptic number.

213720624539 is a deficient number, since it is larger than the sum of its proper divisors (1).

213720624539 is an equidigital number, since it uses as much as digits as its factorization.

213720624539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 213720624539 in words is "two hundred thirteen billion, seven hundred twenty million, six hundred twenty-four thousand, five hundred thirty-nine".