161351 has 4 divisors (see below), whose sum is σ = 164832. Its totient is φ = 157872.

The previous prime is 161341. The next prime is 161363. The reversal of 161351 is 153161.

161351 = 34² + 35² + ... + 80².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153161 = 103 ⋅1487.

It is a cyclic number.

It is not a de Polignac number, because 161351 - 2¹⁴ = 144967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1670 + ... + 1763.

It is an arithmetic number, because the mean of its divisors is an integer number (41208).

2¹⁶¹³⁵¹ is an apocalyptic number.

161351 is a deficient number, since it is larger than the sum of its proper divisors (3481).

161351 is an equidigital number, since it uses as much as digits as its factorization.

161351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3480.

The product of its digits is 90, while the sum is 17.

The square root of 161351 is about 401.6852001257. The cubic root of 161351 is about 54.4407233639.

It can be divided in two parts, 161 and 351, that added together give a 9-th power (512 = 2⁹).

The spelling of 161351 in words is "one hundred sixty-one thousand, three hundred fifty-one".