2021427651 has 8 divisors (see below), whose sum is σ = 2837091520. Its totient is φ = 1276691112.

The previous prime is 2021427647. The next prime is 2021427659. The reversal of 2021427651 is 1567241202.

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

It is not a de Polignac number, because 2021427651 - 2² = 2021427647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021427659) 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, 17731765 + ... + 17731878.

It is an arithmetic number, because the mean of its divisors is an integer number (354636440).

Almost surely, 2^2021427651 is an apocalyptic number.

2021427651 is a deficient number, since it is larger than the sum of its proper divisors (815663869).

2021427651 is a wasteful number, since it uses less digits than its factorization.

2021427651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35463665.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 2021427651 is about 44960.2897121449. The cubic root of 2021427651 is about 1264.4046005784.

Adding to 2021427651 its reverse (1567241202), we get a palindrome (3588668853).

The spelling of 2021427651 in words is "two billion, twenty-one million, four hundred twenty-seven thousand, six hundred fifty-one".