401332021500 has 96 divisors (see below), whose sum is σ = 1176522984000. Its totient is φ = 106303545600.

The previous prime is 401332021499. The next prime is 401332021501. The reversal of 401332021500 is 5120233104.

It is an interprime number because it is at equal distance from previous prime (401332021499) and next prime (401332021501).

It is a super-2 number, since 2×401332021500² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401332021501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 674335 + ... + 1121334.

It is an arithmetic number, because the mean of its divisors is an integer number (12255447750).

Almost surely, 2^401332021500 is an apocalyptic number.

It is an amenable number.

401332021500 is an abundant number, since it is smaller than the sum of its proper divisors (775190962500).

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

401332021500 is a wasteful number, since it uses less digits than its factorization.

401332021500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795840 (or 1795828 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 401332021500 its reverse (5120233104), we get a palindrome (406452254604).

The spelling of 401332021500 in words is "four hundred one billion, three hundred thirty-two million, twenty-one thousand, five hundred".