162531601 has 2 divisors, whose sum is σ = 162531602. Its totient is φ = 162531600.

The previous prime is 162531599. The next prime is 162531617. The reversal of 162531601 is 106135261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135699201 + 26832400 = 11649^2 + 5180^2 .

It is an emirp because it is prime and its reverse (106135261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162531601 - 2¹ = 162531599 is a prime.

Together with 162531599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (162531661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81265800 + 81265801.

It is an arithmetic number, because the mean of its divisors is an integer number (81265801).

Almost surely, 2^162531601 is an apocalyptic number.

It is an amenable number.

162531601 is a deficient number, since it is larger than the sum of its proper divisors (1).

162531601 is an equidigital number, since it uses as much as digits as its factorization.

162531601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 162531601 is about 12748.7882169248. The cubic root of 162531601 is about 545.7318126804.

Adding to 162531601 its reverse (106135261), we get a palindrome (268666862).

The spelling of 162531601 in words is "one hundred sixty-two million, five hundred thirty-one thousand, six hundred one".