2005201556 has 12 divisors (see below), whose sum is σ = 3693792480. Its totient is φ = 949832280.

The previous prime is 2005201543. The next prime is 2005201573. The reversal of 2005201556 is 6551025002.

It is a super-2 number, since 2×2005201556² = 8041666560369642272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13192040 + ... + 13192191.

It is an arithmetic number, because the mean of its divisors is an integer number (307816040).

Almost surely, 2^2005201556 is an apocalyptic number.

It is an amenable number.

2005201556 is a deficient number, since it is larger than the sum of its proper divisors (1688590924).

2005201556 is a wasteful number, since it uses less digits than its factorization.

2005201556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26384254 (or 26384252 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2005201556 is about 44779.4769509426. The cubic root of 2005201556 is about 1261.0123626696.

Adding to 2005201556 its reverse (6551025002), we get a palindrome (8556226558).

The spelling of 2005201556 in words is "two billion, five million, two hundred one thousand, five hundred fifty-six".