220778355 has 16 divisors (see below), whose sum is σ = 403709184. Its totient is φ = 100927200.

The previous prime is 220778339. The next prime is 220778359. The reversal of 220778355 is 553877022.

It is not a de Polignac number, because 220778355 - 2⁴ = 220778339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220778359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1051221 + ... + 1051430.

It is an arithmetic number, because the mean of its divisors is an integer number (25231824).

Almost surely, 2^220778355 is an apocalyptic number.

220778355 is a deficient number, since it is larger than the sum of its proper divisors (182930829).

220778355 is a wasteful number, since it uses less digits than its factorization.

220778355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102666.

The product of its (nonzero) digits is 117600, while the sum is 39.

The square root of 220778355 is about 14858.6121491881. The cubic root of 220778355 is about 604.3921723605.

The spelling of 220778355 in words is "two hundred twenty million, seven hundred seventy-eight thousand, three hundred fifty-five".