2005521501 has 32 divisors (see below), whose sum is σ = 2960133120. Its totient is φ = 1201330944.

The previous prime is 2005521493. The next prime is 2005521503. The reversal of 2005521501 is 1051255002.

It is not a de Polignac number, because 2005521501 - 2³ = 2005521493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005521503) 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, 752910 + ... + 755568.

It is an arithmetic number, because the mean of its divisors is an integer number (92504160).

Almost surely, 2^2005521501 is an apocalyptic number.

It is an amenable number.

2005521501 is a deficient number, since it is larger than the sum of its proper divisors (954611619).

2005521501 is a wasteful number, since it uses less digits than its factorization.

2005521501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 2005521501 is about 44783.0492597367. The cubic root of 2005521501 is about 1261.0794271073.

Adding to 2005521501 its reverse (1051255002), we get a palindrome (3056776503).

The spelling of 2005521501 in words is "two billion, five million, five hundred twenty-one thousand, five hundred one".