2221130551 has 4 divisors (see below), whose sum is σ = 2223028504. Its totient is φ = 2219232600.

The previous prime is 2221130531. The next prime is 2221130567. The reversal of 2221130551 is 1550311222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2221130551 - 2¹⁵ = 2221097783 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 (2221130531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947220 + ... + 949561.

It is an arithmetic number, because the mean of its divisors is an integer number (555757126).

Almost surely, 2^2221130551 is an apocalyptic number.

2221130551 is a deficient number, since it is larger than the sum of its proper divisors (1897953).

2221130551 is a wasteful number, since it uses less digits than its factorization.

2221130551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897952.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 2221130551 is about 47128.8717348506. The cubic root of 2221130551 is about 1304.7421579715.

Adding to 2221130551 its reverse (1550311222), we get a palindrome (3771441773).

The spelling of 2221130551 in words is "two billion, two hundred twenty-one million, one hundred thirty thousand, five hundred fifty-one".