2349925821 has 6 divisors (see below), whose sum is σ = 3394337310. Its totient is φ = 1566617208.

The previous prime is 2349925813. The next prime is 2349925859. The reversal of 2349925821 is 1285299432.

2349925821 is a `hidden beast` number, since 23 + 49 + 9 + 2 + 582 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1852011225 + 497914596 = 43035^2 + 22314^2 .

It is not a de Polignac number, because 2349925821 - 2³ = 2349925813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2349925811) 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 5 ways as a sum of consecutive naturals, for example, 130551426 + ... + 130551443.

It is an arithmetic number, because the mean of its divisors is an integer number (565722885).

Almost surely, 2^2349925821 is an apocalyptic number.

It is an amenable number.

2349925821 is a deficient number, since it is larger than the sum of its proper divisors (1044411489).

2349925821 is a wasteful number, since it uses less digits than its factorization.

2349925821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261102875 (or 261102872 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 2349925821 is about 48476.0334701593. The cubic root of 2349925821 is about 1329.4889062654.

The spelling of 2349925821 in words is "two billion, three hundred forty-nine million, nine hundred twenty-five thousand, eight hundred twenty-one".