201220513415455 has 16 divisors (see below), whose sum is σ = 251990546892480. Its totient is φ = 153960649604608.

The previous prime is 201220513415381. The next prime is 201220513415543. The reversal of 201220513415455 is 554514315022102.

It is a cyclic number.

It is not a de Polignac number, because 201220513415455 - 2²¹ = 201220511318303 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94319770 + ... + 96429559.

It is an arithmetic number, because the mean of its divisors is an integer number (15749409180780).

Almost surely, 2^{201220513415455} is an apocalyptic number.

201220513415455 is a deficient number, since it is larger than the sum of its proper divisors (50770033477025).

201220513415455 is a wasteful number, since it uses less digits than its factorization.

201220513415455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190758530.

The product of its (nonzero) digits is 240000, while the sum is 40.

Adding to 201220513415455 its reverse (554514315022102), we get a palindrome (755734828437557).

The spelling of 201220513415455 in words is "two hundred one trillion, two hundred twenty billion, five hundred thirteen million, four hundred fifteen thousand, four hundred fifty-five".