220772551 has 2 divisors, whose sum is σ = 220772552. Its totient is φ = 220772550.

The previous prime is 220772549. The next prime is 220772611. The reversal of 220772551 is 155277022.

220772551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220772551 - 2¹ = 220772549 is a prime.

Together with 220772549, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220772501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110386275 + 110386276.

It is an arithmetic number, because the mean of its divisors is an integer number (110386276).

Almost surely, 2^220772551 is an apocalyptic number.

220772551 is a deficient number, since it is larger than the sum of its proper divisors (1).

220772551 is an equidigital number, since it uses as much as digits as its factorization.

220772551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 220772551 is about 14858.4168402963. The cubic root of 220772551 is about 604.3868760640.

The spelling of 220772551 in words is "two hundred twenty million, seven hundred seventy-two thousand, five hundred fifty-one".