42221023 has 16 divisors (see below), whose sum is σ = 46448640. Its totient is φ = 38144736.

The previous prime is 42220963. The next prime is 42221027. The reversal of 42221023 is 32012224.

It is a cyclic number.

It is not a de Polignac number, because 42221023 - 2²⁵ = 8666591 is a prime.

It is a super-2 number, since 2×42221023² = 3565229566333058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42220988 and 42221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42221027) 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, 176538 + ... + 176776.

It is an arithmetic number, because the mean of its divisors is an integer number (2903040).

Almost surely, 2^42221023 is an apocalyptic number.

42221023 is a deficient number, since it is larger than the sum of its proper divisors (4227617).

42221023 is a wasteful number, since it uses less digits than its factorization.

42221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42221023 is about 6497.7706176811. The cubic root of 42221023 is about 348.2113455055.

Adding to 42221023 its reverse (32012224), we get a palindrome (74233247).

The spelling of 42221023 in words is "forty-two million, two hundred twenty-one thousand, twenty-three".