401522331 has 16 divisors (see below), whose sum is σ = 612281600. Its totient is φ = 229277088.

The previous prime is 401522327. The next prime is 401522351. The reversal of 401522331 is 133225104.

It is not a de Polignac number, because 401522331 - 2² = 401522327 is a prime.

It is a super-2 number, since 2×401522331² = 322440364583347122, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 401522298 and 401522307.

It is not an unprimeable number, because it can be changed into a prime (401522351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27105 + ... + 39213.

It is an arithmetic number, because the mean of its divisors is an integer number (38267600).

Almost surely, 2^401522331 is an apocalyptic number.

401522331 is a deficient number, since it is larger than the sum of its proper divisors (210759269).

401522331 is a wasteful number, since it uses less digits than its factorization.

401522331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13698.

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

The square root of 401522331 is about 20038.0221329352. The cubic root of 401522331 is about 737.7398356614.

Adding to 401522331 its reverse (133225104), we get a palindrome (534747435).

The spelling of 401522331 in words is "four hundred one million, five hundred twenty-two thousand, three hundred thirty-one".