40131533 has 8 divisors (see below), whose sum is σ = 43344000. Its totient is φ = 36937008.

The previous prime is 40131529. The next prime is 40131541. The reversal of 40131533 is 33513104.

It is a happy number.

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 40131533 - 2² = 40131529 is a prime.

It is a super-2 number, since 2×40131533² = 3221079881860178, 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 (40131503) 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, 368 + ... + 8966.

It is an arithmetic number, because the mean of its divisors is an integer number (5418000).

Almost surely, 2^40131533 is an apocalyptic number.

It is an amenable number.

40131533 is a deficient number, since it is larger than the sum of its proper divisors (3212467).

40131533 is a wasteful number, since it uses less digits than its factorization.

40131533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8971.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 40131533 is about 6334.9453825586. The cubic root of 40131533 is about 342.3696429700.

Adding to 40131533 its reverse (33513104), we get a palindrome (73644637).

The spelling of 40131533 in words is "forty million, one hundred thirty-one thousand, five hundred thirty-three".