265220163 has 48 divisors (see below), whose sum is σ = 435402240. Its totient is φ = 160333344.

The previous prime is 265220161. The next prime is 265220191. The reversal of 265220163 is 361022562.

265220163 is a `hidden beast` number, since 2 + 652 + 2 + 0 + 1 + 6 + 3 = 666.

It is not a de Polignac number, because 265220163 - 2¹ = 265220161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (265220161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 185670 + ... + 187092.

It is an arithmetic number, because the mean of its divisors is an integer number (9070880).

Almost surely, 2^265220163 is an apocalyptic number.

265220163 is a deficient number, since it is larger than the sum of its proper divisors (170182077).

265220163 is a wasteful number, since it uses less digits than its factorization.

265220163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510 (or 1498 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 265220163 is about 16285.5814449469. The cubic root of 265220163 is about 642.4936590895.

The spelling of 265220163 in words is "two hundred sixty-five million, two hundred twenty thousand, one hundred sixty-three".