2001238455 has 8 divisors (see below), whose sum is σ = 3201981552. Its totient is φ = 1067327168.

The previous prime is 2001238433. The next prime is 2001238457. The reversal of 2001238455 is 5548321002.

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 2001238455 - 2⁸ = 2001238199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001238457) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 66707934 + ... + 66707963.

It is an arithmetic number, because the mean of its divisors is an integer number (400247694).

Almost surely, 2^2001238455 is an apocalyptic number.

2001238455 is a deficient number, since it is larger than the sum of its proper divisors (1200743097).

2001238455 is a wasteful number, since it uses less digits than its factorization.

2001238455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133415905.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 2001238455 is about 44735.2037549847. The cubic root of 2001238455 is about 1260.1810554887.

Adding to 2001238455 its reverse (5548321002), we get a palindrome (7549559457).

The spelling of 2001238455 in words is "two billion, one million, two hundred thirty-eight thousand, four hundred fifty-five".