401213215340 has 192 divisors, whose sum is σ = 1003329331200. Its totient is φ = 131857818624.

The previous prime is 401213215327. The next prime is 401213215349. The reversal of 401213215340 is 43512312104.

It is a happy number.

It is a super-2 number, since 2×401213215340² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401213215349) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 436575401 + ... + 436576319.

It is an arithmetic number, because the mean of its divisors is an integer number (5225673600).

Almost surely, 2^401213215340 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 401213215340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501664665600).

401213215340 is an abundant number, since it is smaller than the sum of its proper divisors (602116115860).

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

401213215340 is a wasteful number, since it uses less digits than its factorization.

401213215340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624 (or 1622 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 401213215340 its reverse (43512312104), we get a palindrome (444725527444).

The spelling of 401213215340 in words is "four hundred one billion, two hundred thirteen million, two hundred fifteen thousand, three hundred forty".