221142059 has 4 divisors (see below), whose sum is σ = 221779704. Its totient is φ = 220504416.

The previous prime is 221142049. The next prime is 221142071. The reversal of 221142059 is 950241122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 950241122 = 2 ⋅475120561.

It is a cyclic number.

It is not a de Polignac number, because 221142059 - 2²⁰ = 220093483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221142029) 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, 318302 + ... + 318995.

It is an arithmetic number, because the mean of its divisors is an integer number (55444926).

Almost surely, 2^221142059 is an apocalyptic number.

221142059 is a deficient number, since it is larger than the sum of its proper divisors (637645).

221142059 is an equidigital number, since it uses as much as digits as its factorization.

221142059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637644.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 221142059 is about 14870.8459409679. The cubic root of 221142059 is about 604.7238764545.

The spelling of 221142059 in words is "two hundred twenty-one million, one hundred forty-two thousand, fifty-nine".