40002031 has 8 divisors (see below), whose sum is σ = 40796000. Its totient is φ = 39212640.

The previous prime is 40002023. The next prime is 40002041. The reversal of 40002031 is 13020004.

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 40002031 - 2³ = 40002023 is a prime.

It is a super-2 number, since 2×40002031² = 3200324968249922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40001999 and 40002017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40002041) 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, 20350 + ... + 22228.

It is an arithmetic number, because the mean of its divisors is an integer number (5099500).

Almost surely, 2^40002031 is an apocalyptic number.

40002031 is a deficient number, since it is larger than the sum of its proper divisors (793969).

40002031 is a wasteful number, since it uses less digits than its factorization.

40002031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 40002031 is about 6324.7158829468. The cubic root of 40002031 is about 342.0009775060. Note that the first 3 decimals are identical.

Adding to 40002031 its reverse (13020004), we get a palindrome (53022035).

The spelling of 40002031 in words is "forty million, two thousand, thirty-one".