243331402 has 16 divisors (see below), whose sum is σ = 378201960. Its totient is φ = 117277888.

The previous prime is 243331391. The next prime is 243331409. The reversal of 243331402 is 204133342.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 241771401 + 1560001 = 15549^2 + 1249^2 .

It is not an unprimeable number, because it can be changed into a prime (243331409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36168 + ... + 42364.

Almost surely, 2^243331402 is an apocalyptic number.

243331402 is a deficient number, since it is larger than the sum of its proper divisors (134870558).

243331402 is a wasteful number, since it uses less digits than its factorization.

243331402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6905.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 243331402 is about 15599.0833705061. The cubic root of 243331402 is about 624.3086986859.

Adding to 243331402 its reverse (204133342), we get a palindrome (447464744).

The spelling of 243331402 in words is "two hundred forty-three million, three hundred thirty-one thousand, four hundred two".