402213212 has 12 divisors (see below), whose sum is σ = 704942616. Its totient is φ = 200801040.

The previous prime is 402213211. The next prime is 402213233. The reversal of 402213212 is 212312204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402213211) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 73418 + ... + 78705.

It is an arithmetic number, because the mean of its divisors is an integer number (58745218).

Almost surely, 2^402213212 is an apocalyptic number.

It is an amenable number.

402213212 is a deficient number, since it is larger than the sum of its proper divisors (302729404).

402213212 is a wasteful number, since it uses less digits than its factorization.

402213212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152788 (or 152786 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 402213212 is about 20055.2539749563. The cubic root of 402213212 is about 738.1627248688.

Adding to 402213212 its reverse (212312204), we get a palindrome (614525416).

The spelling of 402213212 in words is "four hundred two million, two hundred thirteen thousand, two hundred twelve".