40521231 has 6 divisors (see below), whose sum is σ = 58530680. Its totient is φ = 27014148.

The previous prime is 40521227. The next prime is 40521241. The reversal of 40521231 is 13212504.

40521231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40521231 - 2² = 40521227 is a prime.

It is a super-2 number, since 2×40521231² = 3283940323510722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40521211) 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 5 ways as a sum of consecutive naturals, for example, 2251171 + ... + 2251188.

Almost surely, 2^40521231 is an apocalyptic number.

40521231 is a deficient number, since it is larger than the sum of its proper divisors (18009449).

40521231 is a wasteful number, since it uses less digits than its factorization.

40521231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502365 (or 4502362 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 40521231 is about 6365.6288770239. The cubic root of 40521231 is about 343.4742707475.

Adding to 40521231 its reverse (13212504), we get a palindrome (53733735).

The spelling of 40521231 in words is "forty million, five hundred twenty-one thousand, two hundred thirty-one".