142216091 has 2 divisors, whose sum is σ = 142216092. Its totient is φ = 142216090.

The previous prime is 142216079. The next prime is 142216097. The reversal of 142216091 is 190612241.

142216091 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 an emirp because it is prime and its reverse (190612241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142216091 - 2¹⁸ = 141953947 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142216091.

It is not a weakly prime, because it can be changed into another prime (142216097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71108045 + 71108046.

It is an arithmetic number, because the mean of its divisors is an integer number (71108046).

Almost surely, 2^142216091 is an apocalyptic number.

142216091 is a deficient number, since it is larger than the sum of its proper divisors (1).

142216091 is an equidigital number, since it uses as much as digits as its factorization.

142216091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 142216091 is about 11925.4388179220. The cubic root of 142216091 is about 521.9748511345.

The spelling of 142216091 in words is "one hundred forty-two million, two hundred sixteen thousand, ninety-one".