40290531 has 4 divisors (see below), whose sum is σ = 53720712. Its totient is φ = 26860352.

The previous prime is 40290511. The next prime is 40290533. The reversal of 40290531 is 13509204.

40290531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40290531 - 2¹¹ = 40288483 is a prime.

It is a super-2 number, since 2×40290531² = 3246653776523922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40290533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6715086 + ... + 6715091.

It is an arithmetic number, because the mean of its divisors is an integer number (13430178).

Almost surely, 2^40290531 is an apocalyptic number.

40290531 is a deficient number, since it is larger than the sum of its proper divisors (13430181).

40290531 is a wasteful number, since it uses less digits than its factorization.

40290531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13430180.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 40290531 is about 6347.4822567692. The cubic root of 40290531 is about 342.8211944204.

Adding to 40290531 its reverse (13509204), we get a palindrome (53799735).

The spelling of 40290531 in words is "forty million, two hundred ninety thousand, five hundred thirty-one".