2005501421533 has 4 divisors (see below), whose sum is σ = 2070195015808. Its totient is φ = 1940807827260.

The previous prime is 2005501421527. The next prime is 2005501421537. The reversal of 2005501421533 is 3351241055002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005501421533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 64693594243 = 2005501421533 / (2 + 0 + 0 + 5 + 5 + 0 + 1 + 4 + 2 + 1 + 5 + 3 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2005501421495 and 2005501421504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005501421537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32346797091 + ... + 32346797152.

It is an arithmetic number, because the mean of its divisors is an integer number (517548753952).

Almost surely, 2^{2005501421533} is an apocalyptic number.

It is an amenable number.

2005501421533 is a deficient number, since it is larger than the sum of its proper divisors (64693594275).

2005501421533 is an equidigital number, since it uses as much as digits as its factorization.

2005501421533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64693594274.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 2005501421533 its reverse (3351241055002), we get a palindrome (5356742476535).

The spelling of 2005501421533 in words is "two trillion, five billion, five hundred one million, four hundred twenty-one thousand, five hundred thirty-three".