2545221001 has 8 divisors (see below), whose sum is σ = 2651493600. Its totient is φ = 2441052960.

The previous prime is 2545220999. The next prime is 2545221013. The reversal of 2545221001 is 1001225452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2545221001 - 2¹ = 2545220999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545221061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523671 + ... + 528508.

It is an arithmetic number, because the mean of its divisors is an integer number (331436700).

Almost surely, 2^2545221001 is an apocalyptic number.

It is an amenable number.

2545221001 is a deficient number, since it is larger than the sum of its proper divisors (106272599).

2545221001 is a wasteful number, since it uses less digits than its factorization.

2545221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052279.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2545221001 is about 50450.1833594289. The cubic root of 2545221001 is about 1365.3432030693.

Adding to 2545221001 its reverse (1001225452), we get a palindrome (3546446453).

The spelling of 2545221001 in words is "two billion, five hundred forty-five million, two hundred twenty-one thousand, one".