42531165 has 24 divisors (see below), whose sum is σ = 73906560. Its totient is φ = 22626144.

The previous prime is 42531133. The next prime is 42531169. The reversal of 42531165 is 56113524.

It is not a de Polignac number, because 42531165 - 2⁵ = 42531133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42531169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21696 + ... + 23574.

It is an arithmetic number, because the mean of its divisors is an integer number (3079440).

Almost surely, 2^42531165 is an apocalyptic number.

42531165 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42531165 is a deficient number, since it is larger than the sum of its proper divisors (31375395).

42531165 is a wasteful number, since it uses less digits than its factorization.

42531165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393 (or 2390 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 42531165 is about 6521.5922135626. The cubic root of 42531165 is about 349.0618823336.

Adding to 42531165 its reverse (56113524), we get a palindrome (98644689).

The spelling of 42531165 in words is "forty-two million, five hundred thirty-one thousand, one hundred sixty-five".