215050139 has 2 divisors, whose sum is σ = 215050140. Its totient is φ = 215050138.

The previous prime is 215050117. The next prime is 215050141. The reversal of 215050139 is 931050512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215050139 - 2¹² = 215046043 is a prime.

Together with 215050141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (215050159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107525069 + 107525070.

It is an arithmetic number, because the mean of its divisors is an integer number (107525070).

Almost surely, 2^215050139 is an apocalyptic number.

215050139 is a deficient number, since it is larger than the sum of its proper divisors (1).

215050139 is an equidigital number, since it uses as much as digits as its factorization.

215050139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 215050139 is about 14664.5879246571. The cubic root of 215050139 is about 599.1192067121.

The spelling of 215050139 in words is "two hundred fifteen million, fifty thousand, one hundred thirty-nine".