220734545 has 16 divisors (see below), whose sum is σ = 280823760. Its totient is φ = 165986304.

The previous prime is 220734499. The next prime is 220734589. The reversal of 220734545 is 545437022.

It can be written as a sum of positive squares in 8 ways, for example, as 271441 + 220463104 = 521^2 + 14848^2 .

It is a cyclic number.

It is not a de Polignac number, because 220734545 - 2¹⁴ = 220718161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103409 + ... + 105521.

It is an arithmetic number, because the mean of its divisors is an integer number (17551485).

Almost surely, 2^220734545 is an apocalyptic number.

It is an amenable number.

220734545 is a deficient number, since it is larger than the sum of its proper divisors (60089215).

220734545 is a wasteful number, since it uses less digits than its factorization.

220734545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364.

The product of its (nonzero) digits is 33600, while the sum is 32.

The square root of 220734545 is about 14857.1378468398. The cubic root of 220734545 is about 604.3521923352.

The spelling of 220734545 in words is "two hundred twenty million, seven hundred thirty-four thousand, five hundred forty-five".