42451222005 has 12 divisors (see below), whose sum is σ = 73582118220. Its totient is φ = 22640651712.

The previous prime is 42451221977. The next prime is 42451222007. The reversal of 42451222005 is 50022215424.

42451222005 is a `hidden beast` number, since 4 + 2 + 451 + 2 + 2 + 200 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32906322801 + 9544899204 = 181401^2 + 97698^2 .

It is not a de Polignac number, because 42451222005 - 2¹³ = 42451213813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42451222005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42451222007) 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, 471680200 + ... + 471680289.

It is an arithmetic number, because the mean of its divisors is an integer number (6131843185).

Almost surely, 2^42451222005 is an apocalyptic number.

42451222005 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42451222005 is a deficient number, since it is larger than the sum of its proper divisors (31130896215).

42451222005 is a wasteful number, since it uses less digits than its factorization.

42451222005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943360500 (or 943360497 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 42451222005 its reverse (50022215424), we get a palindrome (92473437429).

The spelling of 42451222005 in words is "forty-two billion, four hundred fifty-one million, two hundred twenty-two thousand, five".