401111331 has 4 divisors (see below), whose sum is σ = 534815112. Its totient is φ = 267407552.

The previous prime is 401111309. The next prime is 401111351. The reversal of 401111331 is 133111104.

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 401111331 - 2⁹ = 401110819 is a prime.

It is a super-2 number, since 2×401111331² = 321780599713183122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401111331.

It is not an unprimeable number, because it can be changed into a prime (401111351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66851886 + ... + 66851891.

It is an arithmetic number, because the mean of its divisors is an integer number (133703778).

Almost surely, 2^401111331 is an apocalyptic number.

401111331 is a deficient number, since it is larger than the sum of its proper divisors (133703781).

401111331 is a wasteful number, since it uses less digits than its factorization.

401111331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133703780.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 401111331 is about 20027.7640040020. The cubic root of 401111331 is about 737.4880318272.

Adding to 401111331 its reverse (133111104), we get a palindrome (534222435).

The spelling of 401111331 in words is "four hundred one million, one hundred eleven thousand, three hundred thirty-one".