401520220 has 24 divisors (see below), whose sum is σ = 843573024. Its totient is φ = 160535616.

The previous prime is 401520211. The next prime is 401520227. The reversal of 401520220 is 22025104.

It is a super-2 number, since 2×401520220² = 322436974137696800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401520194 and 401520203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401520227) 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 7 ways as a sum of consecutive naturals, for example, 74662 + ... + 79858.

It is an arithmetic number, because the mean of its divisors is an integer number (35148876).

Almost surely, 2^401520220 is an apocalyptic number.

It is an amenable number.

401520220 is an abundant number, since it is smaller than the sum of its proper divisors (442052804).

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

401520220 is a wasteful number, since it uses less digits than its factorization.

401520220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9069 (or 9067 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 401520220 is about 20037.9694580065. The cubic root of 401520220 is about 737.7385427723.

Adding to 401520220 its reverse (22025104), we get a palindrome (423545324).

The spelling of 401520220 in words is "four hundred one million, five hundred twenty thousand, two hundred twenty".