162551 has 4 divisors (see below), whose sum is σ = 165672. Its totient is φ = 159432.

The previous prime is 162529. The next prime is 162553. The reversal of 162551 is 155261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155261 = 17 ⋅9133.

It is a cyclic number.

It is not a de Polignac number, because 162551 - 2¹⁰ = 161527 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1481 + ... + 1586.

It is an arithmetic number, because the mean of its divisors is an integer number (41418).

2¹⁶²⁵⁵¹ is an apocalyptic number.

162551 is a deficient number, since it is larger than the sum of its proper divisors (3121).

162551 is an equidigital number, since it uses as much as digits as its factorization.

162551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120.

The product of its digits is 300, while the sum is 20.

The square root of 162551 is about 403.1761401670. The cubic root of 162551 is about 54.5753523802.

The spelling of 162551 in words is "one hundred sixty-two thousand, five hundred fifty-one".