42211530 has 96 divisors (see below), whose sum is σ = 117936000. Its totient is φ = 10850112.

The previous prime is 42211529. The next prime is 42211531. The reversal of 42211530 is 3511224.

It is an interprime number because it is at equal distance from previous prime (42211529) and next prime (42211531).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (42211531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70171 + ... + 70769.

It is an arithmetic number, because the mean of its divisors is an integer number (1228500).

Almost surely, 2^42211530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42211530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58968000).

42211530 is an abundant number, since it is smaller than the sum of its proper divisors (75724470).

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

42211530 is a wasteful number, since it uses less digits than its factorization.

42211530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 42211530 is about 6497.0400953049. The cubic root of 42211530 is about 348.1852462004.

Adding to 42211530 its reverse (3511224), we get a palindrome (45722754).

The spelling of 42211530 in words is "forty-two million, two hundred eleven thousand, five hundred thirty".