42521052042225 has 72 divisors (see below), whose sum is σ = 81057749429592. Its totient is φ = 21233310105600.

The previous prime is 42521052042211. The next prime is 42521052042257. The reversal of 42521052042225 is 52224025012524.

42521052042225 is a `hidden beast` number, since 42 + 52 + 1 + 0 + 520 + 4 + 22 + 25 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 23002690316544 + 19518361725681 = 4796112^2 + 4417959^2 .

It is not a de Polignac number, because 42521052042225 - 2⁵ = 42521052042193 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42521052042225.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 28061296 + ... + 29537745.

It is an arithmetic number, because the mean of its divisors is an integer number (1125802075411).

Almost surely, 2^{42521052042225} is an apocalyptic number.

42521052042225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42521052042225 is a deficient number, since it is larger than the sum of its proper divisors (38536697387367).

42521052042225 is a wasteful number, since it uses less digits than its factorization.

42521052042225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57599267 (or 57599259 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

Adding to 42521052042225 its reverse (52224025012524), we get a palindrome (94745077054749).

The spelling of 42521052042225 in words is "forty-two trillion, five hundred twenty-one billion, fifty-two million, forty-two thousand, two hundred twenty-five".