162531217 has 4 divisors (see below), whose sum is σ = 165989376. Its totient is φ = 159073060.

The previous prime is 162531209. The next prime is 162531223. The reversal of 162531217 is 712135261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 162531217 - 2³ = 162531209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162531277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1729009 + ... + 1729102.

It is an arithmetic number, because the mean of its divisors is an integer number (41497344).

Almost surely, 2^162531217 is an apocalyptic number.

It is an amenable number.

162531217 is a deficient number, since it is larger than the sum of its proper divisors (3458159).

162531217 is an equidigital number, since it uses as much as digits as its factorization.

162531217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3458158.

The product of its digits is 2520, while the sum is 28.

The square root of 162531217 is about 12748.7731566610. The cubic root of 162531217 is about 545.7313828949.

Adding to 162531217 its reverse (712135261), we get a palindrome (874666478).

The spelling of 162531217 in words is "one hundred sixty-two million, five hundred thirty-one thousand, two hundred seventeen".