2005251545 has 32 divisors (see below), whose sum is σ = 2858544000. Its totient is φ = 1333946880.

The previous prime is 2005251539. The next prime is 2005251631. The reversal of 2005251545 is 5451525002.

It is not a de Polignac number, because 2005251545 - 2⁸ = 2005251289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

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 31 ways as a sum of consecutive naturals, for example, 2780 + ... + 63389.

It is an arithmetic number, because the mean of its divisors is an integer number (89329500).

Almost surely, 2^2005251545 is an apocalyptic number.

It is an amenable number.

2005251545 is a deficient number, since it is larger than the sum of its proper divisors (853292455).

2005251545 is a wasteful number, since it uses less digits than its factorization.

2005251545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66233.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 2005251545 is about 44780.0351161095. The cubic root of 2005251545 is about 1261.0228414538.

Adding to 2005251545 its reverse (5451525002), we get a palindrome (7456776547).

The spelling of 2005251545 in words is "two billion, five million, two hundred fifty-one thousand, five hundred forty-five".