142217583 has 4 divisors (see below), whose sum is σ = 189623448. Its totient is φ = 94811720.

The previous prime is 142217573. The next prime is 142217599. The reversal of 142217583 is 385712241.

142217583 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142217583 - 2²⁵ = 108663151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142217503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23702928 + ... + 23702933.

It is an arithmetic number, because the mean of its divisors is an integer number (47405862).

Almost surely, 2^142217583 is an apocalyptic number.

142217583 is a deficient number, since it is larger than the sum of its proper divisors (47405865).

142217583 is an equidigital number, since it uses as much as digits as its factorization.

142217583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47405864.

The product of its digits is 13440, while the sum is 33.

The square root of 142217583 is about 11925.5013731080. The cubic root of 142217583 is about 521.9766764876.

The spelling of 142217583 in words is "one hundred forty-two million, two hundred seventeen thousand, five hundred eighty-three".