2021312250 has 48 divisors (see below), whose sum is σ = 5465634408. Its totient is φ = 539016000.

The previous prime is 2021312233. The next prime is 2021312261. The reversal of 2021312250 is 522131202.

It can be written as a sum of positive squares in 4 ways, for example, as 1191699441 + 829612809 = 34521^2 + 28803^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 446931 + ... + 451430.

Almost surely, 2^2021312250 is an apocalyptic number.

2021312250 is an abundant number, since it is smaller than the sum of its proper divisors (3444322158).

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

2021312250 is a wasteful number, since it uses less digits than its factorization.

2021312250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898384 (or 898371 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2021312250 is about 44959.0063279873. The cubic root of 2021312250 is about 1264.3805389815.

Adding to 2021312250 its reverse (522131202), we get a palindrome (2543443452).

The spelling of 2021312250 in words is "two billion, twenty-one million, three hundred twelve thousand, two hundred fifty".