42431530 has 16 divisors (see below), whose sum is σ = 76498344. Its totient is φ = 16945600.

The previous prime is 42431461. The next prime is 42431533. The reversal of 42431530 is 3513424.

It can be written as a sum of positive squares in 4 ways, for example, as 32069569 + 10361961 = 5663^2 + 3219^2 .

It is not an unprimeable number, because it can be changed into a prime (42431533) 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, 3984 + ... + 10036.

Almost surely, 2^42431530 is an apocalyptic number.

42431530 is a deficient number, since it is larger than the sum of its proper divisors (34066814).

42431530 is a wasteful number, since it uses less digits than its factorization.

42431530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6761.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 42431530 is about 6513.9488791362. The cubic root of 42431530 is about 348.7890943357.

Adding to 42431530 its reverse (3513424), we get a palindrome (45944954).

The spelling of 42431530 in words is "forty-two million, four hundred thirty-one thousand, five hundred thirty".