163620522 has 48 divisors (see below), whose sum is σ = 383547528. Its totient is φ = 50112000.

The previous prime is 163620493. The next prime is 163620557. The reversal of 163620522 is 225026361.

163620522 is a `hidden beast` number, since 1 + 636 + 2 + 0 + 5 + 22 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 91183401 + 72437121 = 9549^2 + 8511^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53022 + ... + 56022.

Almost surely, 2^163620522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163620522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191773764).

163620522 is an abundant number, since it is smaller than the sum of its proper divisors (219927006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163620522 is a wasteful number, since it uses less digits than its factorization.

163620522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255 (or 3252 counting only the distinct ones).

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

The square root of 163620522 is about 12791.4237675092. The cubic root of 163620522 is about 546.9478564463.

Adding to 163620522 its reverse (225026361), we get a palindrome (388646883).

The spelling of 163620522 in words is "one hundred sixty-three million, six hundred twenty thousand, five hundred twenty-two".