2005105531 has 8 divisors (see below), whose sum is σ = 2355648624. Its totient is φ = 1682605920.

The previous prime is 2005105489. The next prime is 2005105537. The reversal of 2005105531 is 1355015002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2005105531 - 2⁹ = 2005105019 is a prime.

It is a super-2 number, since 2×2005105531² = 8040896380893583922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005105537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7010716 + ... + 7011001.

It is an arithmetic number, because the mean of its divisors is an integer number (294456078).

Almost surely, 2^2005105531 is an apocalyptic number.

2005105531 is a deficient number, since it is larger than the sum of its proper divisors (350543093).

2005105531 is a wasteful number, since it uses less digits than its factorization.

2005105531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14021741.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 2005105531 is about 44778.4047393384. The cubic root of 2005105531 is about 1260.9922332476.

The spelling of 2005105531 in words is "two billion, five million, one hundred five thousand, five hundred thirty-one".