2545423321 has 16 divisors (see below), whose sum is σ = 2998757376. Its totient is φ = 2115384336.

The previous prime is 2545423319. The next prime is 2545423339. The reversal of 2545423321 is 1233245452.

It is a cyclic number.

It is not a de Polignac number, because 2545423321 - 2¹ = 2545423319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545423381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951 + ... + 71356.

It is an arithmetic number, because the mean of its divisors is an integer number (187422336).

Almost surely, 2^2545423321 is an apocalyptic number.

It is an amenable number.

2545423321 is a deficient number, since it is larger than the sum of its proper divisors (453334055).

2545423321 is a wasteful number, since it uses less digits than its factorization.

2545423321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72468.

The product of its digits is 28800, while the sum is 31.

The square root of 2545423321 is about 50452.1884659130. The cubic root of 2545423321 is about 1365.3793792229.

Adding to 2545423321 its reverse (1233245452), we get a palindrome (3778668773).

The spelling of 2545423321 in words is "two billion, five hundred forty-five million, four hundred twenty-three thousand, three hundred twenty-one".