42881530 has 16 divisors (see below), whose sum is σ = 77556384. Its totient is φ = 17070480.

The previous prime is 42881521. The next prime is 42881533. The reversal of 42881530 is 3518824.

It is a junction number, because it is equal to n+sod(n) for n = 42881492 and 42881501.

It is not an unprimeable number, because it can be changed into a prime (42881533) 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, 8052 + ... + 12271.

It is an arithmetic number, because the mean of its divisors is an integer number (4847274).

Almost surely, 2^42881530 is an apocalyptic number.

42881530 is a deficient number, since it is larger than the sum of its proper divisors (34674854).

42881530 is a wasteful number, since it uses less digits than its factorization.

42881530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20541.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 42881530 is about 6548.3990409870. The cubic root of 42881530 is about 350.0177678055.

The spelling of 42881530 in words is "forty-two million, eight hundred eighty-one thousand, five hundred thirty".