2021311248 has 80 divisors (see below), whose sum is σ = 5722300416. Its totient is φ = 609736320.

The previous prime is 2021311247. The next prime is 2021311261. The reversal of 2021311248 is 8421131202.

It is a super-2 number, since 2×2021311248² = 8171398322582635008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (2021311241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109161 + ... + 126327.

Almost surely, 2^2021311248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021311248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2861150208).

2021311248 is an abundant number, since it is smaller than the sum of its proper divisors (3700989168).

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

2021311248 is a wasteful number, since it uses less digits than its factorization.

2021311248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17412 (or 17406 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 2021311248 is about 44958.9951845012. The cubic root of 2021311248 is about 1264.3803300562.

The spelling of 2021311248 in words is "two billion, twenty-one million, three hundred eleven thousand, two hundred forty-eight".