402212005 has 16 divisors (see below), whose sum is σ = 520483824. Its totient is φ = 296616960.

The previous prime is 402212003. The next prime is 402212021. The reversal of 402212005 is 500212204.

It can be written as a sum of positive squares in 8 ways, for example, as 66552964 + 335659041 = 8158^2 + 18321^2 .

It is not a de Polignac number, because 402212005 - 2¹ = 402212003 is a prime.

It is a super-2 number, since 2×402212005² = 323548993932240050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402212003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49597 + ... + 57133.

It is an arithmetic number, because the mean of its divisors is an integer number (32530239).

Almost surely, 2^402212005 is an apocalyptic number.

It is an amenable number.

402212005 is a deficient number, since it is larger than the sum of its proper divisors (118271819).

402212005 is a wasteful number, since it uses less digits than its factorization.

402212005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8376.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 402212005 is about 20055.2238830685. The cubic root of 402212005 is about 738.1619864849.

Adding to 402212005 its reverse (500212204), we get a palindrome (902424209).

The spelling of 402212005 in words is "four hundred two million, two hundred twelve thousand, five".