220974533 has 4 divisors (see below), whose sum is σ = 237972588. Its totient is φ = 203976480.

The previous prime is 220974521. The next prime is 220974583. The reversal of 220974533 is 335479022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 335479022 = 2 ⋅167739511.

It can be written as a sum of positive squares in 2 ways, for example, as 37724164 + 183250369 = 6142^2 + 13537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220974533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220974493 and 220974502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220974583) 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, 8499008 + ... + 8499033.

It is an arithmetic number, because the mean of its divisors is an integer number (59493147).

Almost surely, 2^220974533 is an apocalyptic number.

It is an amenable number.

220974533 is a deficient number, since it is larger than the sum of its proper divisors (16998055).

220974533 is a wasteful number, since it uses less digits than its factorization.

220974533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16998054.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 220974533 is about 14865.2121747387. The cubic root of 220974533 is about 604.5711351729.

The spelling of 220974533 in words is "two hundred twenty million, nine hundred seventy-four thousand, five hundred thirty-three".