42531766 has 16 divisors (see below), whose sum is σ = 67320000. Its totient is φ = 20097288.

The previous prime is 42531763. The next prime is 42531781. The reversal of 42531766 is 66713524.

It is a happy number.

It is a super-2 number, since 2×42531766² = 3617902238157512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42531763) 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, 17841 + ... + 20083.

It is an arithmetic number, because the mean of its divisors is an integer number (4207500).

Almost surely, 2^42531766 is an apocalyptic number.

42531766 is a deficient number, since it is larger than the sum of its proper divisors (24788234).

42531766 is a wasteful number, since it uses less digits than its factorization.

42531766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763.

The product of its digits is 30240, while the sum is 34.

The square root of 42531766 is about 6521.6382911045. The cubic root of 42531766 is about 349.0635265021.

The spelling of 42531766 in words is "forty-two million, five hundred thirty-one thousand, seven hundred sixty-six".