2021244015 has 64 divisors (see below), whose sum is σ = 3737567232. Its totient is φ = 913680000.

The previous prime is 2021244013. The next prime is 2021244041. The reversal of 2021244015 is 5104421202.

It is not a de Polignac number, because 2021244015 - 2¹ = 2021244013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 2021243982 and 2021244000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021244013) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7142064 + ... + 7142346.

It is an arithmetic number, because the mean of its divisors is an integer number (58399488).

Almost surely, 2^2021244015 is an apocalyptic number.

2021244015 is a deficient number, since it is larger than the sum of its proper divisors (1716323217).

2021244015 is a wasteful number, since it uses less digits than its factorization.

2021244015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2021244015 is about 44958.2474636190. The cubic root of 2021244015 is about 1264.3663112643.

Adding to 2021244015 its reverse (5104421202), we get a palindrome (7125665217).

The spelling of 2021244015 in words is "two billion, twenty-one million, two hundred forty-four thousand, fifteen".