221335023 has 32 divisors (see below), whose sum is σ = 369198592. Its totient is φ = 114825600.

The previous prime is 221335013. The next prime is 221335039. The reversal of 221335023 is 320533122.

It is not a de Polignac number, because 221335023 - 2⁶ = 221334959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221335013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10008 + ... + 23298.

It is an arithmetic number, because the mean of its divisors is an integer number (11537456).

Almost surely, 2^221335023 is an apocalyptic number.

221335023 is a deficient number, since it is larger than the sum of its proper divisors (147863569).

221335023 is a wasteful number, since it uses less digits than its factorization.

221335023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13375.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 221335023 is about 14877.3325230029. The cubic root of 221335023 is about 604.8997151811.

Adding to 221335023 its reverse (320533122), we get a palindrome (541868145).

The spelling of 221335023 in words is "two hundred twenty-one million, three hundred thirty-five thousand, twenty-three".