40023331 has 4 divisors (see below), whose sum is σ = 40045192. Its totient is φ = 40001472.

The previous prime is 40023323. The next prime is 40023341. The reversal of 40023331 is 13332004.

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 40023331 - 2³ = 40023323 is a prime.

It is a super-2 number, since 2×40023331² = 3203734048671122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40023311) 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, 7905 + ... + 11938.

It is an arithmetic number, because the mean of its divisors is an integer number (10011298).

Almost surely, 2^40023331 is an apocalyptic number.

40023331 is a deficient number, since it is larger than the sum of its proper divisors (21861).

40023331 is a wasteful number, since it uses less digits than its factorization.

40023331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21860.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 40023331 is about 6326.3995289580. The cubic root of 40023331 is about 342.0616688264.

Adding to 40023331 its reverse (13332004), we get a palindrome (53355335).

The spelling of 40023331 in words is "forty million, twenty-three thousand, three hundred thirty-one".