219157543939 has 2 divisors, whose sum is σ = 219157543940. Its totient is φ = 219157543938.

The previous prime is 219157543933. The next prime is 219157543951. The reversal of 219157543939 is 939345751912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 219157543939 - 2⁵ = 219157543907 is a prime.

It is not a weakly prime, because it can be changed into another prime (219157543933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109578771969 + 109578771970.

It is an arithmetic number, because the mean of its divisors is an integer number (109578771970).

Almost surely, 2^219157543939 is an apocalyptic number.

219157543939 is a deficient number, since it is larger than the sum of its proper divisors (1).

219157543939 is an equidigital number, since it uses as much as digits as its factorization.

219157543939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9185400, while the sum is 58.

The spelling of 219157543939 in words is "two hundred nineteen billion, one hundred fifty-seven million, five hundred forty-three thousand, nine hundred thirty-nine".