401532222 has 64 divisors (see below), whose sum is σ = 999613440. Its totient is φ = 104696064.

The previous prime is 401532167. The next prime is 401532223. The reversal of 401532222 is 222235104.

It is a super-2 number, since 2×401532222² = 322456250608514568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401532223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44463 + ... + 52725.

It is an arithmetic number, because the mean of its divisors is an integer number (15618960).

Almost surely, 2^401532222 is an apocalyptic number.

401532222 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 401532222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (499806720).

401532222 is an abundant number, since it is smaller than the sum of its proper divisors (598081218).

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

401532222 is a wasteful number, since it uses less digits than its factorization.

401532222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8377.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 401532222 is about 20038.2689372111. The cubic root of 401532222 is about 737.7458933775.

Adding to 401532222 its reverse (222235104), we get a palindrome (623767326).

The spelling of 401532222 in words is "four hundred one million, five hundred thirty-two thousand, two hundred twenty-two".