42550530 has 32 divisors (see below), whose sum is σ = 111405888. Its totient is φ = 10315200.

The previous prime is 42550499. The next prime is 42550537. The reversal of 42550530 is 3505524.

It is a self number, because there is not a number n which added to its sum of digits gives 42550530.

It is not an unprimeable number, because it can be changed into a prime (42550537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64141 + ... + 64800.

It is an arithmetic number, because the mean of its divisors is an integer number (3481434).

Almost surely, 2^42550530 is an apocalyptic number.

42550530 is an abundant number, since it is smaller than the sum of its proper divisors (68855358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42550530 is a wasteful number, since it uses less digits than its factorization.

42550530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128962.

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 42550530 is about 6523.0767280479. The cubic root of 42550530 is about 349.1148517871.

The spelling of 42550530 in words is "forty-two million, five hundred fifty thousand, five hundred thirty".