42221620 has 24 divisors (see below), whose sum is σ = 101332224. Its totient is φ = 14475936.

The previous prime is 42221611. The next prime is 42221623. The reversal of 42221620 is 2612224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42221623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150652 + ... + 150931.

It is an arithmetic number, because the mean of its divisors is an integer number (4222176).

Almost surely, 2^42221620 is an apocalyptic number.

It is an amenable number.

42221620 is an abundant number, since it is smaller than the sum of its proper divisors (59110604).

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

42221620 is a wasteful number, since it uses less digits than its factorization.

42221620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301599 (or 301597 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 42221620 is about 6497.8165563518. The cubic root of 42221620 is about 348.2129867194.

Adding to 42221620 its reverse (2612224), we get a palindrome (44833844).

The spelling of 42221620 in words is "forty-two million, two hundred twenty-one thousand, six hundred twenty".