42815500 has 96 divisors (see below), whose sum is σ = 115210368. Its totient is φ = 13536000.

The previous prime is 42815491. The next prime is 42815501. The reversal of 42815500 is 551824.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (42815501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45030 + ... + 45970.

It is an arithmetic number, because the mean of its divisors is an integer number (1200108).

Almost surely, 2^42815500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42815500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57605184).

42815500 is an abundant number, since it is smaller than the sum of its proper divisors (72394868).

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

42815500 is a wasteful number, since it uses less digits than its factorization.

42815500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 42815500 is about 6543.3554083513. The cubic root of 42815500 is about 349.8380202856.

The spelling of 42815500 in words is "forty-two million, eight hundred fifteen thousand, five hundred".