215005723 has 2 divisors, whose sum is σ = 215005724. Its totient is φ = 215005722.

The previous prime is 215005597. The next prime is 215005733. The reversal of 215005723 is 327500512.

215005723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215005723 is a prime.

It is not a weakly prime, because it can be changed into another prime (215005733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107502861 + 107502862.

It is an arithmetic number, because the mean of its divisors is an integer number (107502862).

Almost surely, 2^215005723 is an apocalyptic number.

215005723 is a deficient number, since it is larger than the sum of its proper divisors (1).

215005723 is an equidigital number, since it uses as much as digits as its factorization.

215005723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 215005723 is about 14663.0734499968. The cubic root of 215005723 is about 599.0779569349.

The spelling of 215005723 in words is "two hundred fifteen million, five thousand, seven hundred twenty-three".