40442331 has 8 divisors (see below), whose sum is σ = 54573120. Its totient is φ = 26636552.

The previous prime is 40442323. The next prime is 40442341. The reversal of 40442331 is 13324404.

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 40442331 - 2³ = 40442323 is a prime.

It is a super-2 number, since 2×40442331² = 3271164273427122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40442298 and 40442307.

It is not an unprimeable number, because it can be changed into a prime (40442341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80961 + ... + 81458.

It is an arithmetic number, because the mean of its divisors is an integer number (6821640).

Almost surely, 2^40442331 is an apocalyptic number.

40442331 is a deficient number, since it is larger than the sum of its proper divisors (14130789).

40442331 is a wasteful number, since it uses less digits than its factorization.

40442331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162505.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 40442331 is about 6359.4285120599. The cubic root of 40442331 is about 343.2511965099.

Adding to 40442331 its reverse (13324404), we get a palindrome (53766735).

The spelling of 40442331 in words is "forty million, four hundred forty-two thousand, three hundred thirty-one".