2031561885 has 16 divisors (see below), whose sum is σ = 3254088960. Its totient is φ = 1082303040.

The previous prime is 2031561881. The next prime is 2031561899. The reversal of 2031561885 is 5881651302.

It is not a de Polignac number, because 2031561885 - 2² = 2031561881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031561881) 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, 60670 + ... + 87999.

It is an arithmetic number, because the mean of its divisors is an integer number (203380560).

Almost surely, 2^2031561885 is an apocalyptic number.

It is an amenable number.

2031561885 is a deficient number, since it is larger than the sum of its proper divisors (1222527075).

2031561885 is a wasteful number, since it uses less digits than its factorization.

2031561885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149588.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 2031561885 is about 45072.8508639070. The cubic root of 2031561885 is about 1266.5140697597.

The spelling of 2031561885 in words is "two billion, thirty-one million, five hundred sixty-one thousand, eight hundred eighty-five".