42031500 has 96 divisors (see below), whose sum is σ = 139915776. Its totient is φ = 9604800.

The previous prime is 42031471. The next prime is 42031523. The reversal of 42031500 is 513024.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 42031500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8499 + ... + 12501.

It is an arithmetic number, because the mean of its divisors is an integer number (1457456).

Almost surely, 2^42031500 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 42031500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69957888).

42031500 is an abundant number, since it is smaller than the sum of its proper divisors (97884276).

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

42031500 is a wasteful number, since it uses less digits than its factorization.

42031500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4032 (or 4020 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 42031500 is about 6483.1705206635. The cubic root of 42031500 is about 347.6895434386.

Adding to 42031500 its reverse (513024), we get a palindrome (42544524).

The spelling of 42031500 in words is "forty-two million, thirty-one thousand, five hundred".