40543131 has 16 divisors (see below), whose sum is σ = 58867200. Its totient is φ = 24722208.

The previous prime is 40543127. The next prime is 40543141. The reversal of 40543131 is 13134504.

It is not a de Polignac number, because 40543131 - 2² = 40543127 is a prime.

It is a super-2 number, since 2×40543131² = 3287490942566322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40543098 and 40543107.

It is not an unprimeable number, because it can be changed into a prime (40543141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10611 + ... + 13916.

It is an arithmetic number, because the mean of its divisors is an integer number (3679200).

Almost surely, 2^40543131 is an apocalyptic number.

40543131 is a deficient number, since it is larger than the sum of its proper divisors (18324069).

40543131 is a wasteful number, since it uses less digits than its factorization.

40543131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24578.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 40543131 is about 6367.3488203490. The cubic root of 40543131 is about 343.5361373430.

Adding to 40543131 its reverse (13134504), we get a palindrome (53677635).

The spelling of 40543131 in words is "forty million, five hundred forty-three thousand, one hundred thirty-one".