42163531 has 8 divisors (see below), whose sum is σ = 44321184. Its totient is φ = 40032960.

The previous prime is 42163487. The next prime is 42163549. The reversal of 42163531 is 13536124.

42163531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42163531 - 2⁷ = 42163403 is a prime.

It is a super-2 number, since 2×42163531² = 3555526692775922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42163496 and 42163505.

It is not an unprimeable number, because it can be changed into a prime (42163031) 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 7 ways as a sum of consecutive naturals, for example, 3540 + ... + 9841.

It is an arithmetic number, because the mean of its divisors is an integer number (5540148).

Almost surely, 2^42163531 is an apocalyptic number.

42163531 is a deficient number, since it is larger than the sum of its proper divisors (2157653).

42163531 is a wasteful number, since it uses less digits than its factorization.

42163531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13541.

The product of its digits is 2160, while the sum is 25.

The square root of 42163531 is about 6493.3451317484. The cubic root of 42163531 is about 348.0532215910.

Adding to 42163531 its reverse (13536124), we get a palindrome (55699655).

It can be divided in two parts, 4216 and 3531, that multiplied together give a triangular number (14886696 = T₅₄₅₆).

The spelling of 42163531 in words is "forty-two million, one hundred sixty-three thousand, five hundred thirty-one".