243373381 has 4 divisors (see below), whose sum is σ = 243414432. Its totient is φ = 243332332.

The previous prime is 243373369. The next prime is 243373387. The reversal of 243373381 is 183373342.

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 243373381 - 2⁵ = 243373349 is a prime.

It is a super-2 number, since 2×243373381² = 118461205158742322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243373387) 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, 9745 + ... + 24118.

It is an arithmetic number, because the mean of its divisors is an integer number (60853608).

Almost surely, 2^243373381 is an apocalyptic number.

It is an amenable number.

243373381 is a deficient number, since it is larger than the sum of its proper divisors (41051).

243373381 is an equidigital number, since it uses as much as digits as its factorization.

243373381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41050.

The product of its digits is 36288, while the sum is 34.

The square root of 243373381 is about 15600.4288723099. The cubic root of 243373381 is about 624.3445980776.

The spelling of 243373381 in words is "two hundred forty-three million, three hundred seventy-three thousand, three hundred eighty-one".