2152944469 has 4 divisors (see below), whose sum is σ = 2318555596. Its totient is φ = 1987333344.

The previous prime is 2152944467. The next prime is 2152944487. The reversal of 2152944469 is 9644492512.

It is a happy number.

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 155301444 + 1997643025 = 12462^2 + 44695^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152944469 - 2¹ = 2152944467 is a prime.

It is a super-2 number, since 2×2152944469² = 9270339773195383922, 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 (2152944467) 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, 82805544 + ... + 82805569.

It is an arithmetic number, because the mean of its divisors is an integer number (579638899).

Almost surely, 2^2152944469 is an apocalyptic number.

It is an amenable number.

2152944469 is a deficient number, since it is larger than the sum of its proper divisors (165611127).

2152944469 is a wasteful number, since it uses less digits than its factorization.

2152944469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165611126.

The product of its digits is 622080, while the sum is 46.

The square root of 2152944469 is about 46399.8326397844. The cubic root of 2152944469 is about 1291.2518083159.

The spelling of 2152944469 in words is "two billion, one hundred fifty-two million, nine hundred forty-four thousand, four hundred sixty-nine".