223542493 has 4 divisors (see below), whose sum is σ = 229584220. Its totient is φ = 217500768.

The previous prime is 223542463. The next prime is 223542521. The reversal of 223542493 is 394245322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 394245322 = 2 ⋅197122661.

It can be written as a sum of positive squares in 2 ways, for example, as 167262489 + 56280004 = 12933^2 + 7502^2 .

It is a cyclic number.

It is not a de Polignac number, because 223542493 - 2¹³ = 223534301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223542413) 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, 3020808 + ... + 3020881.

It is an arithmetic number, because the mean of its divisors is an integer number (57396055).

Almost surely, 2^223542493 is an apocalyptic number.

It is an amenable number.

223542493 is a deficient number, since it is larger than the sum of its proper divisors (6041727).

223542493 is an equidigital number, since it uses as much as digits as its factorization.

223542493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6041726.

The product of its digits is 51840, while the sum is 34.

The square root of 223542493 is about 14951.3374986989. The cubic root of 223542493 is about 606.9040421092.

The spelling of 223542493 in words is "two hundred twenty-three million, five hundred forty-two thousand, four hundred ninety-three".