2221142551 has 2 divisors, whose sum is σ = 2221142552. Its totient is φ = 2221142550.

The previous prime is 2221142543. The next prime is 2221142621. The reversal of 2221142551 is 1552411222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221142551 - 2³ = 2221142543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221142501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110571275 + 1110571276.

It is an arithmetic number, because the mean of its divisors is an integer number (1110571276).

Almost surely, 2^2221142551 is an apocalyptic number.

2221142551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221142551 is an equidigital number, since it uses as much as digits as its factorization.

2221142551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1600, while the sum is 25.

The square root of 2221142551 is about 47128.9990451739. Note that the first 3 decimals coincide. The cubic root of 2221142551 is about 1304.7445076574.

Adding to 2221142551 its reverse (1552411222), we get a palindrome (3773553773).

The spelling of 2221142551 in words is "two billion, two hundred twenty-one million, one hundred forty-two thousand, five hundred fifty-one".