40031001 has 6 divisors (see below), whose sum is σ = 57822570. Its totient is φ = 26687328.

The previous prime is 40030999. The next prime is 40031009. The reversal of 40031001 is 10013004.

It can be written as a sum of positive squares in only one way, i.e., 39992976 + 38025 = 6324^2 + 195^2 .

It is not a de Polignac number, because 40031001 - 2¹ = 40030999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 4447889 = 40031001 / (4 + 0 + 0 + 3 + 1 + 0 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (40031009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2223936 + ... + 2223953.

It is an arithmetic number, because the mean of its divisors is an integer number (9637095).

Almost surely, 2^40031001 is an apocalyptic number.

It is an amenable number.

40031001 is a deficient number, since it is larger than the sum of its proper divisors (17791569).

40031001 is a wasteful number, since it uses less digits than its factorization.

40031001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4447895 (or 4447892 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 40031001 is about 6327.0056898979. The cubic root of 40031001 is about 342.0835181275.

Adding to 40031001 its reverse (10013004), we get a palindrome (50044005).

The spelling of 40031001 in words is "forty million, thirty-one thousand, one".