223505257 has 16 divisors (see below), whose sum is σ = 237625344. Its totient is φ = 209898000.

The previous prime is 223505251. The next prime is 223505279. The reversal of 223505257 is 752505322.

It is a cyclic number.

It is not a de Polignac number, because 223505257 - 2¹¹ = 223503209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223505251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190282 + ... + 191452.

It is an arithmetic number, because the mean of its divisors is an integer number (14851584).

Almost surely, 2^223505257 is an apocalyptic number.

It is an amenable number.

223505257 is a deficient number, since it is larger than the sum of its proper divisors (14120087).

223505257 is a wasteful number, since it uses less digits than its factorization.

223505257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380.

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 223505257 is about 14950.0922070735. The cubic root of 223505257 is about 606.8703424257.

The spelling of 223505257 in words is "two hundred twenty-three million, five hundred five thousand, two hundred fifty-seven".