220801557 has 8 divisors (see below), whose sum is σ = 294761376. Its totient is φ = 147021392.

The previous prime is 220801547. The next prime is 220801579. The reversal of 220801557 is 755108022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220801557 - 2⁷ = 220801429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220801547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42018 + ... + 46979.

It is an arithmetic number, because the mean of its divisors is an integer number (36845172).

Almost surely, 2^220801557 is an apocalyptic number.

It is an amenable number.

220801557 is a deficient number, since it is larger than the sum of its proper divisors (73959819).

220801557 is an equidigital number, since it uses as much as digits as its factorization.

220801557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89827.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 220801557 is about 14859.3928880019. The cubic root of 220801557 is about 604.4133438441.

Adding to 220801557 its reverse (755108022), we get a palindrome (975909579).

The spelling of 220801557 in words is "two hundred twenty million, eight hundred one thousand, five hundred fifty-seven".