331135240402 has 4 divisors (see below), whose sum is σ = 496702860606. Its totient is φ = 165567620200.

The previous prime is 331135240399. The next prime is 331135240421. The reversal of 331135240402 is 204042531133.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 165649814001 + 165485426401 = 407001^2 + 406799^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82783810099 + ... + 82783810102.

Almost surely, 2^331135240402 is an apocalyptic number.

331135240402 is a deficient number, since it is larger than the sum of its proper divisors (165567620204).

331135240402 is a wasteful number, since it uses less digits than its factorization.

331135240402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165567620203.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 331135240402 its reverse (204042531133), we get a palindrome (535177771535).

The spelling of 331135240402 in words is "three hundred thirty-one billion, one hundred thirty-five million, two hundred forty thousand, four hundred two".