2001100455 has 24 divisors (see below), whose sum is σ = 3516094608. Its totient is φ = 1052631936.

The previous prime is 2001100433. The next prime is 2001100483. The reversal of 2001100455 is 5540011002.

2001100455 is a `hidden beast` number, since 200 + 1 + 10 + 0 + 455 = 666.

It is not a de Polignac number, because 2001100455 - 2⁷ = 2001100327 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 301297 + ... + 307866.

It is an arithmetic number, because the mean of its divisors is an integer number (146503942).

Almost surely, 2^2001100455 is an apocalyptic number.

2001100455 is a deficient number, since it is larger than the sum of its proper divisors (1514994153).

2001100455 is a wasteful number, since it uses less digits than its factorization.

2001100455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609247 (or 609244 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 2001100455 is about 44733.6613189665. The cubic root of 2001100455 is about 1260.1520885953.

Adding to 2001100455 its reverse (5540011002), we get a palindrome (7541111457).

The spelling of 2001100455 in words is "two billion, one million, one hundred thousand, four hundred fifty-five".