210139831427 has 2 divisors, whose sum is σ = 210139831428. Its totient is φ = 210139831426.

The previous prime is 210139831417. The next prime is 210139831441. The reversal of 210139831427 is 724138931012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210139831427 - 2³⁴ = 192959962243 is a prime.

It is not a weakly prime, because it can be changed into another prime (210139831417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105069915713 + 105069915714.

It is an arithmetic number, because the mean of its divisors is an integer number (105069915714).

Almost surely, 2^210139831427 is an apocalyptic number.

210139831427 is a deficient number, since it is larger than the sum of its proper divisors (1).

210139831427 is an equidigital number, since it uses as much as digits as its factorization.

210139831427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 210139831427 in words is "two hundred ten billion, one hundred thirty-nine million, eight hundred thirty-one thousand, four hundred twenty-seven".