2021651061 has 8 divisors (see below), whose sum is σ = 2700895680. Its totient is φ = 1345086912.

The previous prime is 2021651059. The next prime is 2021651087. The reversal of 2021651061 is 1601561202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2021651061 - 2¹ = 2021651059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021655061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668356 + ... + 671373.

It is an arithmetic number, because the mean of its divisors is an integer number (337611960).

Almost surely, 2^2021651061 is an apocalyptic number.

It is an amenable number.

2021651061 is a deficient number, since it is larger than the sum of its proper divisors (679244619).

2021651061 is a wasteful number, since it uses less digits than its factorization.

2021651061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340235.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 2021651061 is about 44962.7741693059. The cubic root of 2021651061 is about 1264.4511799066.

The spelling of 2021651061 in words is "two billion, twenty-one million, six hundred fifty-one thousand, sixty-one".