401451331 has 4 divisors (see below), whose sum is σ = 401762152. Its totient is φ = 401140512.

The previous prime is 401451317. The next prime is 401451341. The reversal of 401451331 is 133154104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 401451331 - 2²⁵ = 367896899 is a prime.

It is a super-2 number, since 2×401451331² = 322326342323343122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401451341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153465 + ... + 156058.

It is an arithmetic number, because the mean of its divisors is an integer number (100440538).

Almost surely, 2^401451331 is an apocalyptic number.

401451331 is a deficient number, since it is larger than the sum of its proper divisors (310821).

401451331 is a wasteful number, since it uses less digits than its factorization.

401451331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310820.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 401451331 is about 20036.2504226714. The cubic root of 401451331 is about 737.6963489842.

The spelling of 401451331 in words is "four hundred one million, four hundred fifty-one thousand, three hundred thirty-one".