243340042 has 32 divisors (see below), whose sum is σ = 404974080. Its totient is φ = 108743280.

The previous prime is 243340021. The next prime is 243340063. The reversal of 243340042 is 240043342.

It is an interprime number because it is at equal distance from previous prime (243340021) and next prime (243340063).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 243339995 and 243340022.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392809 + ... + 393427.

It is an arithmetic number, because the mean of its divisors is an integer number (12655440).

Almost surely, 2^243340042 is an apocalyptic number.

243340042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

243340042 is a deficient number, since it is larger than the sum of its proper divisors (161634038).

243340042 is a wasteful number, since it uses less digits than its factorization.

243340042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 243340042 is about 15599.3603073972. The cubic root of 243340042 is about 624.3160877354.

Adding to 243340042 its reverse (240043342), we get a palindrome (483383384).

The spelling of 243340042 in words is "two hundred forty-three million, three hundred forty thousand, forty-two".