42221451 has 16 divisors (see below), whose sum is σ = 57417984. Its totient is φ = 27592224.

The previous prime is 42221437. The next prime is 42221467. The reversal of 42221451 is 15412224.

42221451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42221451 - 2¹¹ = 42219403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42221051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32425 + ... + 33701.

It is an arithmetic number, because the mean of its divisors is an integer number (3588624).

Almost surely, 2^42221451 is an apocalyptic number.

42221451 is a deficient number, since it is larger than the sum of its proper divisors (15196533).

42221451 is a wasteful number, since it uses less digits than its factorization.

42221451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490.

The product of its digits is 640, while the sum is 21.

The square root of 42221451 is about 6497.8035519705. The cubic root of 42221451 is about 348.2125221227.

Adding to 42221451 its reverse (15412224), we get a palindrome (57633675).

The spelling of 42221451 in words is "forty-two million, two hundred twenty-one thousand, four hundred fifty-one".