2157014669 has 4 divisors (see below), whose sum is σ = 2163415644. Its totient is φ = 2150613696.

The previous prime is 2157014659. The next prime is 2157014687. The reversal of 2157014669 is 9664107512.

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

It can be written as a sum of positive squares in 2 ways, for example, as 763859044 + 1393155625 = 27638^2 + 37325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2157014669 is a prime.

It is a super-2 number, since 2×2157014669² = 9305424564562359122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157014659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3199982 + ... + 3200655.

It is an arithmetic number, because the mean of its divisors is an integer number (540853911).

Almost surely, 2^2157014669 is an apocalyptic number.

It is an amenable number.

2157014669 is a deficient number, since it is larger than the sum of its proper divisors (6400975).

2157014669 is an equidigital number, since it uses as much as digits as its factorization.

2157014669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400974.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 2157014669 is about 46443.6720016839. The cubic root of 2157014669 is about 1292.0650116095.

The spelling of 2157014669 in words is "two billion, one hundred fifty-seven million, fourteen thousand, six hundred sixty-nine".