243023401 has 4 divisors (see below), whose sum is σ = 248675152. Its totient is φ = 237371652.

The previous prime is 243023399. The next prime is 243023447. The reversal of 243023401 is 104320342.

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 a cyclic number.

It is not a de Polignac number, because 243023401 - 2¹ = 243023399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243023491) 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, 2825811 + ... + 2825896.

It is an arithmetic number, because the mean of its divisors is an integer number (62168788).

Almost surely, 2^243023401 is an apocalyptic number.

It is an amenable number.

243023401 is a deficient number, since it is larger than the sum of its proper divisors (5651751).

243023401 is an equidigital number, since it uses as much as digits as its factorization.

243023401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5651750.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 243023401 is about 15589.2078374753. The cubic root of 243023401 is about 624.0451775654.

Adding to 243023401 its reverse (104320342), we get a palindrome (347343743).

The spelling of 243023401 in words is "two hundred forty-three million, twenty-three thousand, four hundred one".