223691472 has 30 divisors (see below), whose sum is σ = 626025842. Its totient is φ = 74563776.

The previous prime is 223691459. The next prime is 223691473. The reversal of 223691472 is 274196322.

It can be written as a sum of positive squares in only one way, i.e., 218921616 + 4769856 = 14796^2 + 2184^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223691473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 776563 + ... + 776850.

Almost surely, 2^223691472 is an apocalyptic number.

It is an amenable number.

223691472 is an abundant number, since it is smaller than the sum of its proper divisors (402334370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223691472 is a wasteful number, since it uses less digits than its factorization.

223691472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553427 (or 1553418 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 223691472 is about 14956.3187984210. The cubic root of 223691472 is about 607.0388350930.

The spelling of 223691472 in words is "two hundred twenty-three million, six hundred ninety-one thousand, four hundred seventy-two".