223420622818 has 4 divisors (see below), whose sum is σ = 335130934230. Its totient is φ = 111710311408.

The previous prime is 223420622779. The next prime is 223420622833. The reversal of 223420622818 is 818226024322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 198446193729 + 24974429089 = 445473^2 + 158033^2 .

It is a super-2 number, since 2×223420622818² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55855155703 + ... + 55855155706.

Almost surely, 2^223420622818 is an apocalyptic number.

223420622818 is a deficient number, since it is larger than the sum of its proper divisors (111710311412).

223420622818 is a wasteful number, since it uses less digits than its factorization.

223420622818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111710311411.

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 223420622818 in words is "two hundred twenty-three billion, four hundred twenty million, six hundred twenty-two thousand, eight hundred eighteen".