401312212 has 48 divisors (see below), whose sum is σ = 830890368. Its totient is φ = 166008960.

The previous prime is 401312209. The next prime is 401312213. The reversal of 401312212 is 212213104.

It is a super-2 number, since 2×401312212² = 322102983000665888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401312213) 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 15 ways as a sum of consecutive naturals, for example, 134238 + ... + 137194.

It is an arithmetic number, because the mean of its divisors is an integer number (17310216).

Almost surely, 2^401312212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401312212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (415445184).

401312212 is an abundant number, since it is smaller than the sum of its proper divisors (429578156).

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

401312212 is a wasteful number, since it uses less digits than its factorization.

401312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136 (or 3134 counting only the distinct ones).

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

The square root of 401312212 is about 20032.7784393478. The cubic root of 401312212 is about 737.6111253406.

Adding to 401312212 its reverse (212213104), we get a palindrome (613525316).

The spelling of 401312212 in words is "four hundred one million, three hundred twelve thousand, two hundred twelve".