243054401 has 4 divisors (see below), whose sum is σ = 243132372. Its totient is φ = 242976432.

The previous prime is 243054397. The next prime is 243054431. The reversal of 243054401 is 104450342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 203804176 + 39250225 = 14276^2 + 6265^2 .

It is a cyclic number.

It is not a de Polignac number, because 243054401 - 2² = 243054397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243054431) 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, 34106 + ... + 40611.

It is an arithmetic number, because the mean of its divisors is an integer number (60783093).

Almost surely, 2^243054401 is an apocalyptic number.

It is an amenable number.

243054401 is a deficient number, since it is larger than the sum of its proper divisors (77971).

243054401 is an equidigital number, since it uses as much as digits as its factorization.

243054401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77970.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 243054401 is about 15590.2020833599. The cubic root of 243054401 is about 624.0717107825.

The spelling of 243054401 in words is "two hundred forty-three million, fifty-four thousand, four hundred one".