2005451501 has 16 divisors (see below), whose sum is σ = 2163532800. Its totient is φ = 1852765488.

The previous prime is 2005451479. The next prime is 2005451519. The reversal of 2005451501 is 1051545002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2005451501 - 2¹⁸ = 2005189357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005451531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 641420 + ... + 644538.

It is an arithmetic number, because the mean of its divisors is an integer number (135220800).

Almost surely, 2^2005451501 is an apocalyptic number.

It is an amenable number.

2005451501 is a deficient number, since it is larger than the sum of its proper divisors (158081299).

2005451501 is a wasteful number, since it uses less digits than its factorization.

2005451501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 2005451501 is about 44782.2677072075. The cubic root of 2005451501 is about 1261.0647548492.

Adding to 2005451501 its reverse (1051545002), we get a palindrome (3056996503).

The spelling of 2005451501 in words is "two billion, five million, four hundred fifty-one thousand, five hundred one".