221023061 has 4 divisors (see below), whose sum is σ = 252597792. Its totient is φ = 189448332.

The previous prime is 221023039. The next prime is 221023097. The reversal of 221023061 is 160320122.

221023061 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221023061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221023861) 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, 15787355 + ... + 15787368.

It is an arithmetic number, because the mean of its divisors is an integer number (63149448).

Almost surely, 2^221023061 is an apocalyptic number.

It is an amenable number.

221023061 is a deficient number, since it is larger than the sum of its proper divisors (31574731).

221023061 is an equidigital number, since it uses as much as digits as its factorization.

221023061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31574730.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 221023061 is about 14866.8443524509. The cubic root of 221023061 is about 604.6153883578.

Adding to 221023061 its reverse (160320122), we get a palindrome (381343183).

The spelling of 221023061 in words is "two hundred twenty-one million, twenty-three thousand, sixty-one".