2031256540 has 12 divisors (see below), whose sum is σ = 4265638776. Its totient is φ = 812502608.

The previous prime is 2031256531. The next prime is 2031256573. The reversal of 2031256540 is 456521302.

It is a junction number, because it is equal to n+sod(n) for n = 2031256499 and 2031256508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50781394 + ... + 50781433.

It is an arithmetic number, because the mean of its divisors is an integer number (355469898).

Almost surely, 2^2031256540 is an apocalyptic number.

2031256540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031256540 is an abundant number, since it is smaller than the sum of its proper divisors (2234382236).

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

2031256540 is a wasteful number, since it uses less digits than its factorization.

2031256540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101562836 (or 101562834 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2031256540 is about 45069.4634980271. The cubic root of 2031256540 is about 1266.4506139661.

Adding to 2031256540 its reverse (456521302), we get a palindrome (2487777842).

The spelling of 2031256540 in words is "two billion, thirty-one million, two hundred fifty-six thousand, five hundred forty".