221283043 has 4 divisors (see below), whose sum is σ = 221364360. Its totient is φ = 221201728.

The previous prime is 221283019. The next prime is 221283071. The reversal of 221283043 is 340382122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340382122 = 2 ⋅170191061.

It is a cyclic number.

It is not a de Polignac number, because 221283043 - 2⁵ = 221283011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221282999 and 221283017.

It is not an unprimeable number, because it can be changed into a prime (221283143) 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, 36430 + ... + 42067.

It is an arithmetic number, because the mean of its divisors is an integer number (55341090).

Almost surely, 2^221283043 is an apocalyptic number.

221283043 is a deficient number, since it is larger than the sum of its proper divisors (81317).

221283043 is an equidigital number, since it uses as much as digits as its factorization.

221283043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81316.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 221283043 is about 14875.5854674698. The cubic root of 221283043 is about 604.8523583906.

The spelling of 221283043 in words is "two hundred twenty-one million, two hundred eighty-three thousand, forty-three".