402331212442 has 8 divisors (see below), whose sum is σ = 603543810996. Its totient is φ = 201149942112.

The previous prime is 402331212431. The next prime is 402331212473. The reversal of 402331212442 is 244212133204.

It can be written as a sum of positive squares in 2 ways, for example, as 397516379121 + 4814833321 = 630489^2 + 69389^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 402331212442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7799923 + ... + 7851334.

Almost surely, 2^402331212442 is an apocalyptic number.

402331212442 is a deficient number, since it is larger than the sum of its proper divisors (201212598554).

402331212442 is a wasteful number, since it uses less digits than its factorization.

402331212442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15664112.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 402331212442 its reverse (244212133204), we get a palindrome (646543345646).

The spelling of 402331212442 in words is "four hundred two billion, three hundred thirty-one million, two hundred twelve thousand, four hundred forty-two".