201251281455 has 32 divisors (see below), whose sum is σ = 408891494400. Its totient is φ = 92000585376.

The previous prime is 201251281447. The next prime is 201251281457. The reversal of 201251281455 is 554182152102.

201251281455 is a `hidden beast` number, since 2 + 0 + 12 + 512 + 81 + 4 + 55 = 666.

It is not a de Polignac number, because 201251281455 - 2³ = 201251281447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201251281457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106481215 + ... + 106483104.

It is an arithmetic number, because the mean of its divisors is an integer number (12777859200).

Almost surely, 2^201251281455 is an apocalyptic number.

201251281455 is an abundant number, since it is smaller than the sum of its proper divisors (207640212945).

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

201251281455 is a wasteful number, since it uses less digits than its factorization.

201251281455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212964340 (or 212964334 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The spelling of 201251281455 in words is "two hundred one billion, two hundred fifty-one million, two hundred eighty-one thousand, four hundred fifty-five".