223545493 has 2 divisors, whose sum is σ = 223545494. Its totient is φ = 223545492.

The previous prime is 223545481. The next prime is 223545587. The reversal of 223545493 is 394545322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206841924 + 16703569 = 14382^2 + 4087^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223545493 is a prime.

It is a super-2 number, since 2×223545493² = 99945174881226098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223545193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111772746 + 111772747.

It is an arithmetic number, because the mean of its divisors is an integer number (111772747).

Almost surely, 2^223545493 is an apocalyptic number.

It is an amenable number.

223545493 is a deficient number, since it is larger than the sum of its proper divisors (1).

223545493 is an equidigital number, since it uses as much as digits as its factorization.

223545493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 37.

The square root of 223545493 is about 14951.4378238349. The cubic root of 223545493 is about 606.9067570352.

The spelling of 223545493 in words is "two hundred twenty-three million, five hundred forty-five thousand, four hundred ninety-three".