224403938218 has 20 divisors (see below), whose sum is σ = 351906998850. Its totient is φ = 107323354952.

The previous prime is 224403938159. The next prime is 224403938221. The reversal of 224403938218 is 812839304422.

It can be written as a sum of positive squares in only one way, i.e., 220170223729 + 4233714489 = 469223^2 + 65067^2 .

It is a super-2 number, since 2×224403938218² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 359208 + ... + 760156.

Almost surely, 2^224403938218 is an apocalyptic number.

224403938218 is a deficient number, since it is larger than the sum of its proper divisors (127503060632).

224403938218 is an frugal number, since it uses more digits than its factorization.

224403938218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401043 (or 400974 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 46.

The spelling of 224403938218 in words is "two hundred twenty-four billion, four hundred three million, nine hundred thirty-eight thousand, two hundred eighteen".