42221005450 has 24 divisors (see below), whose sum is σ = 84571922988. Its totient is φ = 15589294080.

The previous prime is 42221005433. The next prime is 42221005451. The reversal of 42221005450 is 5450012224.

It can be written as a sum of positive squares in 6 ways, for example, as 13994653401 + 28226352049 = 118299^2 + 168007^2 .

It is a super-2 number, since 2×42221005450² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (42221005451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32477047 + ... + 32478346.

Almost surely, 2^42221005450 is an apocalyptic number.

42221005450 is an abundant number, since it is smaller than the sum of its proper divisors (42350917538).

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

42221005450 is a wasteful number, since it uses less digits than its factorization.

42221005450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64955418 (or 64955413 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 42221005450 its reverse (5450012224), we get a palindrome (47671017674).

The spelling of 42221005450 in words is "forty-two billion, two hundred twenty-one million, five thousand, four hundred fifty".