2221025501 has 4 divisors (see below), whose sum is σ = 2337921600. Its totient is φ = 2104129404.

The previous prime is 2221025491. The next prime is 2221025519. The reversal of 2221025501 is 1055201222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2221025501 - 2¹⁴ = 2221009117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221025531) 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, 58448021 + ... + 58448058.

It is an arithmetic number, because the mean of its divisors is an integer number (584480400).

Almost surely, 2^2221025501 is an apocalyptic number.

It is an amenable number.

2221025501 is a deficient number, since it is larger than the sum of its proper divisors (116896099).

2221025501 is a wasteful number, since it uses less digits than its factorization.

2221025501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116896098.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2221025501 is about 47127.7572243789. The cubic root of 2221025501 is about 1304.7215880678.

Adding to 2221025501 its reverse (1055201222), we get a palindrome (3276226723).

The spelling of 2221025501 in words is "two billion, two hundred twenty-one million, twenty-five thousand, five hundred one".