2152720651 has 4 divisors (see below), whose sum is σ = 2160723600. Its totient is φ = 2144717704.

The previous prime is 2152720613. The next prime is 2152720657. The reversal of 2152720651 is 1560272512.

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 2152720651 - 2⁹ = 2152720139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2152720657) 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, 4001071 + ... + 4001608.

It is an arithmetic number, because the mean of its divisors is an integer number (540180900).

Almost surely, 2^2152720651 is an apocalyptic number.

2152720651 is a deficient number, since it is larger than the sum of its proper divisors (8002949).

2152720651 is an equidigital number, since it uses as much as digits as its factorization.

2152720651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8002948.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 2152720651 is about 46397.4207365022. The cubic root of 2152720651 is about 1291.2070610071.

The spelling of 2152720651 in words is "two billion, one hundred fifty-two million, seven hundred twenty thousand, six hundred fifty-one".