220340623 has 4 divisors (see below), whose sum is σ = 220371408. Its totient is φ = 220309840.

The previous prime is 220340599. The next prime is 220340647. The reversal of 220340623 is 326043022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 326043022 = 2 ⋅163021511.

It is an interprime number because it is at equal distance from previous prime (220340599) and next prime (220340647).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220340623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220340594 and 220340603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220340693) 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, 1590 + ... + 21052.

It is an arithmetic number, because the mean of its divisors is an integer number (55092852).

Almost surely, 2^220340623 is an apocalyptic number.

220340623 is a deficient number, since it is larger than the sum of its proper divisors (30785).

220340623 is a wasteful number, since it uses less digits than its factorization.

220340623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30784.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 220340623 is about 14843.8749321058. The cubic root of 220340623 is about 603.9924700829.

Adding to 220340623 its reverse (326043022), we get a palindrome (546383645).

The spelling of 220340623 in words is "two hundred twenty million, three hundred forty thousand, six hundred twenty-three".