1220163385 has 16 divisors (see below), whose sum is σ = 1674086400. Its totient is φ = 836323776.

The previous prime is 1220163383. The next prime is 1220163397. The reversal of 1220163385 is 5833610221.

It is a cyclic number.

It is not a de Polignac number, because 1220163385 - 2¹ = 1220163383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220163383) 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, 94711 + ... + 106819.

It is an arithmetic number, because the mean of its divisors is an integer number (104630400).

Almost surely, 2^1220163385 is an apocalyptic number.

It is an amenable number.

1220163385 is a deficient number, since it is larger than the sum of its proper divisors (453923015).

1220163385 is a wasteful number, since it uses less digits than its factorization.

1220163385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15000.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1220163385 is about 34930.8371643166. The cubic root of 1220163385 is about 1068.5774279459.

The spelling of 1220163385 in words is "one billion, two hundred twenty million, one hundred sixty-three thousand, three hundred eighty-five".