401533423500 has 384 divisors, whose sum is σ = 1300654817280. Its totient is φ = 95445504000.

The previous prime is 401533423483. The next prime is 401533423507. The reversal of 401533423500 is 5324335104.

It is a super-2 number, since 2×401533423500² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (401533423507) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 186498424 + ... + 186500576.

It is an arithmetic number, because the mean of its divisors is an integer number (3387121920).

Almost surely, 2^401533423500 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 401533423500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (650327408640).

401533423500 is an abundant number, since it is smaller than the sum of its proper divisors (899121393780).

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

401533423500 is a wasteful number, since it uses less digits than its factorization.

401533423500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402 (or 2390 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 401533423500 its reverse (5324335104), we get a palindrome (406857758604).

The spelling of 401533423500 in words is "four hundred one billion, five hundred thirty-three million, four hundred twenty-three thousand, five hundred".