2031538278 has 64 divisors (see below), whose sum is σ = 5086126080. Its totient is φ = 525540000.

The previous prime is 2031538277. The next prime is 2031538291. The reversal of 2031538278 is 8728351302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031538277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107203 + ... + 124721.

It is an arithmetic number, because the mean of its divisors is an integer number (79470720).

Almost surely, 2^2031538278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2031538278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2543063040).

2031538278 is an abundant number, since it is smaller than the sum of its proper divisors (3054587802).

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

2031538278 is a wasteful number, since it uses less digits than its factorization.

2031538278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17793.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 2031538278 is about 45072.5889870995. The cubic root of 2031538278 is about 1266.5091640574.

The spelling of 2031538278 in words is "two billion, thirty-one million, five hundred thirty-eight thousand, two hundred seventy-eight".