223785457 has 4 divisors (see below), whose sum is σ = 255754816. Its totient is φ = 191816100.

The previous prime is 223785449. The next prime is 223785481. The reversal of 223785457 is 754587322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 223785457 - 2³ = 223785449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223785487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15984669 + ... + 15984682.

It is an arithmetic number, because the mean of its divisors is an integer number (63938704).

Almost surely, 2^223785457 is an apocalyptic number.

It is an amenable number.

223785457 is a deficient number, since it is larger than the sum of its proper divisors (31969359).

223785457 is an equidigital number, since it uses as much as digits as its factorization.

223785457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31969358.

The product of its digits is 470400, while the sum is 43.

The square root of 223785457 is about 14959.4604515002. The cubic root of 223785457 is about 607.1238399079.

The spelling of 223785457 in words is "two hundred twenty-three million, seven hundred eighty-five thousand, four hundred fifty-seven".