42215530 has 32 divisors (see below), whose sum is σ = 91416960. Its totient is φ = 13711680.

The previous prime is 42215513. The next prime is 42215531. The reversal of 42215530 is 3551224.

It is not an unprimeable number, because it can be changed into a prime (42215531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14541 + ... + 17200.

It is an arithmetic number, because the mean of its divisors is an integer number (2856780).

Almost surely, 2^42215530 is an apocalyptic number.

42215530 is an abundant number, since it is smaller than the sum of its proper divisors (49201430).

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

42215530 is a wasteful number, since it uses less digits than its factorization.

42215530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31774.

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

The square root of 42215530 is about 6497.3479204980. The cubic root of 42215530 is about 348.1962439618.

Adding to 42215530 its reverse (3551224), we get a palindrome (45766754).

The spelling of 42215530 in words is "forty-two million, two hundred fifteen thousand, five hundred thirty".