2031291405 has 128 divisors (see below), whose sum is σ = 4342947840. Its totient is φ = 887604480.

The previous prime is 2031291401. The next prime is 2031291407. The reversal of 2031291405 is 5041921302.

It is not a de Polignac number, because 2031291405 - 2² = 2031291401 is a prime.

It is a super-2 number, since 2×2031291405² = 8252289544053748050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031291401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 828892 + ... + 831338.

It is an arithmetic number, because the mean of its divisors is an integer number (33929280).

Almost surely, 2^2031291405 is an apocalyptic number.

It is an amenable number.

2031291405 is an abundant number, since it is smaller than the sum of its proper divisors (2311656435).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2031291405 is a wasteful number, since it uses less digits than its factorization.

2031291405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2528 (or 2522 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 2031291405 is about 45069.8502881916. The cubic root of 2031291405 is about 1266.4578598173.

The spelling of 2031291405 in words is "two billion, thirty-one million, two hundred ninety-one thousand, four hundred five".