2021057279 has 4 divisors (see below), whose sum is σ = 2021180784. Its totient is φ = 2020933776.

The previous prime is 2021057267. The next prime is 2021057281. The reversal of 2021057279 is 9727501202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2021057279 - 2⁸ = 2021057023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021050279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32627 + ... + 71460.

It is an arithmetic number, because the mean of its divisors is an integer number (505295196).

Almost surely, 2^2021057279 is an apocalyptic number.

2021057279 is a deficient number, since it is larger than the sum of its proper divisors (123505).

2021057279 is a wasteful number, since it uses less digits than its factorization.

2021057279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123504.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 2021057279 is about 44956.1706443064. The cubic root of 2021057279 is about 1264.3273732016.

The spelling of 2021057279 in words is "two billion, twenty-one million, fifty-seven thousand, two hundred seventy-nine".