40421331 has 12 divisors (see below), whose sum is σ = 60400080. Its totient is φ = 26018160.

The previous prime is 40421323. The next prime is 40421347. The reversal of 40421331 is 13312404.

It is not a de Polignac number, because 40421331 - 2³ = 40421323 is a prime.

It is a super-2 number, since 2×40421331² = 3267767999623122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40461331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77175 + ... + 77696.

It is an arithmetic number, because the mean of its divisors is an integer number (5033340).

Almost surely, 2^40421331 is an apocalyptic number.

40421331 is a deficient number, since it is larger than the sum of its proper divisors (19978749).

40421331 is a wasteful number, since it uses less digits than its factorization.

40421331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154906 (or 154903 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 40421331 is about 6357.7772059109. Note that the first 3 decimals coincide. The cubic root of 40421331 is about 343.1917742580.

Adding to 40421331 its reverse (13312404), we get a palindrome (53733735).

The spelling of 40421331 in words is "forty million, four hundred twenty-one thousand, three hundred thirty-one".