215500039 has 2 divisors, whose sum is σ = 215500040. Its totient is φ = 215500038.

The previous prime is 215500001. The next prime is 215500049. The reversal of 215500039 is 930005512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215500039 - 2²³ = 207111431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215499986 and 215500022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215500049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107750019 + 107750020.

It is an arithmetic number, because the mean of its divisors is an integer number (107750020).

Almost surely, 2^215500039 is an apocalyptic number.

215500039 is a deficient number, since it is larger than the sum of its proper divisors (1).

215500039 is an equidigital number, since it uses as much as digits as its factorization.

215500039 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 25.

The square root of 215500039 is about 14679.9195842484. The cubic root of 215500039 is about 599.5367155194.

The spelling of 215500039 in words is "two hundred fifteen million, five hundred thousand, thirty-nine".