40031011 has 2 divisors, whose sum is σ = 40031012. Its totient is φ = 40031010.

The previous prime is 40031009. The next prime is 40031021. The reversal of 40031011 is 11013004.

It is a happy number.

It is an a-pointer prime, because the next prime (40031021) can be obtained adding 40031011 to its sum of digits (10).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40031011 - 2¹ = 40031009 is a prime.

Together with 40031009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40031021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20015505 + 20015506.

It is an arithmetic number, because the mean of its divisors is an integer number (20015506).

Almost surely, 2^40031011 is an apocalyptic number.

40031011 is a deficient number, since it is larger than the sum of its proper divisors (1).

40031011 is an equidigital number, since it uses as much as digits as its factorization.

40031011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 40031011 is about 6327.0064801611. The cubic root of 40031011 is about 342.0835466123.

Adding to 40031011 its reverse (11013004), we get a palindrome (51044015).

The spelling of 40031011 in words is "forty million, thirty-one thousand, eleven".