405541111 has 8 divisors (see below), whose sum is σ = 427190400. Its totient is φ = 383922360.

The previous prime is 405541109. The next prime is 405541181. The reversal of 405541111 is 111145504.

It is a happy number.

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

It is not a de Polignac number, because 405541111 - 2¹ = 405541109 is a prime.

It is a super-2 number, since 2×405541111² = 328927185422228642, 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 (405541181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22776 + ... + 36466.

It is an arithmetic number, because the mean of its divisors is an integer number (53398800).

Almost surely, 2^405541111 is an apocalyptic number.

405541111 is a deficient number, since it is larger than the sum of its proper divisors (21649289).

405541111 is a wasteful number, since it uses less digits than its factorization.

405541111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15269.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 405541111 is about 20138.0513208205. The cubic root of 405541111 is about 740.1929804704.

Adding to 405541111 its reverse (111145504), we get a palindrome (516686615).

The spelling of 405541111 in words is "four hundred five million, five hundred forty-one thousand, one hundred eleven".