2031520778 has 8 divisors (see below), whose sum is σ = 3482607072. Its totient is φ = 870651756.

The previous prime is 2031520769. The next prime is 2031520783. The reversal of 2031520778 is 8770251302.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 72554300 + ... + 72554327.

It is an arithmetic number, because the mean of its divisors is an integer number (435325884).

Almost surely, 2^2031520778 is an apocalyptic number.

2031520778 is a deficient number, since it is larger than the sum of its proper divisors (1451086294).

2031520778 is a wasteful number, since it uses less digits than its factorization.

2031520778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145108636.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 2031520778 is about 45072.3948553879. The cubic root of 2031520778 is about 1266.5055274086.

The spelling of 2031520778 in words is "two billion, thirty-one million, five hundred twenty thousand, seven hundred seventy-eight".