201254516505 has 96 divisors (see below), whose sum is σ = 409832317440. Its totient is φ = 89462983680.

The previous prime is 201254516503. The next prime is 201254516521. The reversal of 201254516505 is 505615452102.

201254516505 is a `hidden beast` number, since 20 + 125 + 4 + 5 + 1 + 6 + 505 = 666.

It is not a de Polignac number, because 201254516505 - 2¹ = 201254516503 is a prime.

It is a super-2 number, since 2×201254516505² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201254516505.

It is not an unprimeable number, because it can be changed into a prime (201254516503) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1571011 + ... + 1694279.

It is an arithmetic number, because the mean of its divisors is an integer number (4269086640).

Almost surely, 2^201254516505 is an apocalyptic number.

It is an amenable number.

201254516505 is an abundant number, since it is smaller than the sum of its proper divisors (208577800935).

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

201254516505 is a wasteful number, since it uses less digits than its factorization.

201254516505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123431 (or 123428 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

Adding to 201254516505 its reverse (505615452102), we get a palindrome (706869968607).

The spelling of 201254516505 in words is "two hundred one billion, two hundred fifty-four million, five hundred sixteen thousand, five hundred five".