402131212 has 12 divisors (see below), whose sum is σ = 804262480. Its totient is φ = 172341936.

The previous prime is 402131173. The next prime is 402131237. The reversal of 402131212 is 212131204.

402131212 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7180887 + ... + 7180942.

Almost surely, 2^402131212 is an apocalyptic number.

It is an amenable number.

402131212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402131212 is a wasteful number, since it uses less digits than its factorization.

402131212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14361840 (or 14361838 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 402131212 is about 20053.2095186781. The cubic root of 402131212 is about 738.1125578964.

Adding to 402131212 its reverse (212131204), we get a palindrome (614262416).

The spelling of 402131212 in words is "four hundred two million, one hundred thirty-one thousand, two hundred twelve".