163445525 has 6 divisors (see below), whose sum is σ = 202672482. Its totient is φ = 130756400.

The previous prime is 163445519. The next prime is 163445533. The reversal of 163445525 is 525544361.

It can be written as a sum of positive squares in 3 ways, for example, as 22714756 + 140730769 = 4766^2 + 11863^2 .

It is not a de Polignac number, because 163445525 - 2¹² = 163441429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3268886 + ... + 3268935.

It is an arithmetic number, because the mean of its divisors is an integer number (33778747).

Almost surely, 2^163445525 is an apocalyptic number.

It is an amenable number.

163445525 is a deficient number, since it is larger than the sum of its proper divisors (39226957).

163445525 is an equidigital number, since it uses as much as digits as its factorization.

163445525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6537831 (or 6537826 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

The square root of 163445525 is about 12784.5815340198. The cubic root of 163445525 is about 546.7527945714.

Adding to 163445525 its reverse (525544361), we get a palindrome (688989886).

The spelling of 163445525 in words is "one hundred sixty-three million, four hundred forty-five thousand, five hundred twenty-five".