401633111 has 8 divisors (see below), whose sum is σ = 439765248. Its totient is φ = 363771000.

The previous prime is 401633087. The next prime is 401633131. The reversal of 401633111 is 111336104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401633111 - 2¹⁸ = 401370967 is a prime.

It is a super-2 number, since 2×401633111² = 322618311703076642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401633131) 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, 64385 + ... + 70346.

It is an arithmetic number, because the mean of its divisors is an integer number (54970656).

Almost surely, 2^401633111 is an apocalyptic number.

401633111 is a deficient number, since it is larger than the sum of its proper divisors (38132137).

401633111 is a wasteful number, since it uses less digits than its factorization.

401633111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135013.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 401633111 is about 20040.7861871734. The cubic root of 401633111 is about 737.8076768894.

Adding to 401633111 its reverse (111336104), we get a palindrome (512969215).

The spelling of 401633111 in words is "four hundred one million, six hundred thirty-three thousand, one hundred eleven".