220061551 has 2 divisors, whose sum is σ = 220061552. Its totient is φ = 220061550.

The previous prime is 220061521. The next prime is 220061561. The reversal of 220061551 is 155160022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220061551 - 2⁵ = 220061519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220061521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110030775 + 110030776.

It is an arithmetic number, because the mean of its divisors is an integer number (110030776).

Almost surely, 2^220061551 is an apocalyptic number.

220061551 is a deficient number, since it is larger than the sum of its proper divisors (1).

220061551 is an equidigital number, since it uses as much as digits as its factorization.

220061551 is an evil number, because the sum of its binary digits is even.

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

The square root of 220061551 is about 14834.4717128720. The cubic root of 220061551 is about 603.7373671783.

The spelling of 220061551 in words is "two hundred twenty million, sixty-one thousand, five hundred fifty-one".