43542331 has 12 divisors (see below), whose sum is σ = 51057408. Its totient is φ = 37022832.

The previous prime is 43542313. The next prime is 43542337. The reversal of 43542331 is 13324534.

It is not a de Polignac number, because 43542331 - 2⁹ = 43541819 is a prime.

It is a super-2 number, since 2×43542331² = 3791869177827122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43542296 and 43542305.

It is not an unprimeable number, because it can be changed into a prime (43542337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2725 + ... + 9721.

It is an arithmetic number, because the mean of its divisors is an integer number (4254784).

Almost surely, 2^43542331 is an apocalyptic number.

43542331 is a deficient number, since it is larger than the sum of its proper divisors (7515077).

43542331 is a wasteful number, since it uses less digits than its factorization.

43542331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7138 (or 7131 counting only the distinct ones).

The product of its digits is 4320, while the sum is 25.

The square root of 43542331 is about 6598.6613036282. The cubic root of 43542331 is about 351.8065262325.

Adding to 43542331 its reverse (13324534), we get a palindrome (56866865).

The spelling of 43542331 in words is "forty-three million, five hundred forty-two thousand, three hundred thirty-one".