223421505 has 32 divisors (see below), whose sum is σ = 367476480. Its totient is φ = 115845120.

The previous prime is 223421491. The next prime is 223421521. The reversal of 223421505 is 505124322.

It is not a de Polignac number, because 223421505 - 2⁴ = 223421489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265876 + ... + 266714.

It is an arithmetic number, because the mean of its divisors is an integer number (11483640).

Almost surely, 2^223421505 is an apocalyptic number.

It is an amenable number.

223421505 is a deficient number, since it is larger than the sum of its proper divisors (144054975).

223421505 is a wasteful number, since it uses less digits than its factorization.

223421505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 223421505 is about 14947.2908916633. The cubic root of 223421505 is about 606.7945307043.

Adding to 223421505 its reverse (505124322), we get a palindrome (728545827).

The spelling of 223421505 in words is "two hundred twenty-three million, four hundred twenty-one thousand, five hundred five".