219252091 has 2 divisors, whose sum is σ = 219252092. Its totient is φ = 219252090.

The previous prime is 219252049. The next prime is 219252101. The reversal of 219252091 is 190252912.

219252091 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 not a de Polignac number, because 219252091 - 2²⁷ = 85034363 is a prime.

It is not a weakly prime, because it can be changed into another prime (219252041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109626045 + 109626046.

It is an arithmetic number, because the mean of its divisors is an integer number (109626046).

Almost surely, 2^219252091 is an apocalyptic number.

219252091 is a deficient number, since it is larger than the sum of its proper divisors (1).

219252091 is an equidigital number, since it uses as much as digits as its factorization.

219252091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 219252091 is about 14807.1635028455. The cubic root of 219252091 is about 602.9962083575.

The spelling of 219252091 in words is "two hundred nineteen million, two hundred fifty-two thousand, ninety-one".