42315520 has 72 divisors (see below), whose sum is σ = 109198656. Its totient is φ = 15618048.

The previous prime is 42315487. The next prime is 42315521. The reversal of 42315520 is 2551324.

It is a junction number, because it is equal to n+sod(n) for n = 42315491 and 42315500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42315521) 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, 15369 + ... + 17911.

It is an arithmetic number, because the mean of its divisors is an integer number (1516648).

Almost surely, 2^42315520 is an apocalyptic number.

42315520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42315520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54599328).

42315520 is an abundant number, since it is smaller than the sum of its proper divisors (66883136).

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

42315520 is a wasteful number, since it uses less digits than its factorization.

42315520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577 (or 2563 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 42315520 is about 6505.0380475444. The cubic root of 42315520 is about 348.4709350570.

Adding to 42315520 its reverse (2551324), we get a palindrome (44866844).

The spelling of 42315520 in words is "forty-two million, three hundred fifteen thousand, five hundred twenty".