45252525252521 has 8 divisors (see below), whose sum is σ = 45517845287304. Its totient is φ = 44987248261120.

The previous prime is 45252525252509. The next prime is 45252525252589. The reversal of 45252525252521 is 12525252525254.

It can be written as a sum of positive squares in 4 ways, for example, as 11232310943296 + 34020214309225 = 3351464^2 + 5832685^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45252525252521 - 2⁶ = 45252525252457 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45252525252821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8650826 + ... + 12858531.

It is an arithmetic number, because the mean of its divisors is an integer number (5689730660913).

Almost surely, 2^{45252525252521} is an apocalyptic number.

It is an amenable number.

45252525252521 is a deficient number, since it is larger than the sum of its proper divisors (265320034783).

45252525252521 is a wasteful number, since it uses less digits than its factorization.

45252525252521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21521691.

The product of its digits is 4000000, while the sum is 47.

Adding to 45252525252521 its reverse (12525252525254), we get a palindrome (57777777777775).

It can be divided in two parts, 4 and 5252525252521, that added together give a palindrome (5252525252525).

The spelling of 45252525252521 in words is "forty-five trillion, two hundred fifty-two billion, five hundred twenty-five million, two hundred fifty-two thousand, five hundred twenty-one".