223478520 has 64 divisors (see below), whose sum is σ = 688569120. Its totient is φ = 57982464.

The previous prime is 223478461. The next prime is 223478543. The reversal of 223478520 is 25874322.

It is a congruent number.

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, 20727 + ... + 29606.

Almost surely, 2^223478520 is an apocalyptic number.

223478520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223478520 is an abundant number, since it is smaller than the sum of its proper divisors (465090600).

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

223478520 is a wasteful number, since it uses less digits than its factorization.

223478520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50384 (or 50380 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 223478520 is about 14949.1979717977. The cubic root of 223478520 is about 606.8461423396.

The spelling of 223478520 in words is "two hundred twenty-three million, four hundred seventy-eight thousand, five hundred twenty".