42320220 has 48 divisors (see below), whose sum is σ = 124736640. Its totient is φ = 10691136.

The previous prime is 42320203. The next prime is 42320237. The reversal of 42320220 is 2202324.

It is an interprime number because it is at equal distance from previous prime (42320203) and next prime (42320237).

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 42320220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17422 + ... + 19701.

It is an arithmetic number, because the mean of its divisors is an integer number (2598680).

Almost surely, 2^42320220 is an apocalyptic number.

It is an amenable number.

42320220 is an abundant number, since it is smaller than the sum of its proper divisors (82416420).

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

42320220 is a wasteful number, since it uses less digits than its factorization.

42320220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37154 (or 37152 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 42320220 is about 6505.3992959695. The cubic root of 42320220 is about 348.4838361766.

Adding to 42320220 its reverse (2202324), we get a palindrome (44522544).

The spelling of 42320220 in words is "forty-two million, three hundred twenty thousand, two hundred twenty".