215054993 has 2 divisors, whose sum is σ = 215054994. Its totient is φ = 215054992.

The previous prime is 215054927. The next prime is 215054999. The reversal of 215054993 is 399450512.

215054993 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 can be written as a sum of positive squares in only one way, i.e., 162231169 + 52823824 = 12737^2 + 7268^2 .

It is a cyclic number.

It is not a de Polignac number, because 215054993 - 2⁸ = 215054737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (215054999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107527496 + 107527497.

It is an arithmetic number, because the mean of its divisors is an integer number (107527497).

Almost surely, 2^215054993 is an apocalyptic number.

It is an amenable number.

215054993 is a deficient number, since it is larger than the sum of its proper divisors (1).

215054993 is an equidigital number, since it uses as much as digits as its factorization.

215054993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 215054993 is about 14664.7534244528. The cubic root of 215054993 is about 599.1237143473.

The spelling of 215054993 in words is "two hundred fifteen million, fifty-four thousand, nine hundred ninety-three".