161345351 has 4 divisors (see below), whose sum is σ = 170836272. Its totient is φ = 151854432.

The previous prime is 161345339. The next prime is 161345363. The reversal of 161345351 is 153543161.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (161345339) and next prime (161345363).

It is a cyclic number.

It is not a de Polignac number, because 161345351 - 2²⁶ = 94236487 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 (161345251) 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, 4745435 + ... + 4745468.

It is an arithmetic number, because the mean of its divisors is an integer number (42709068).

Almost surely, 2^161345351 is an apocalyptic number.

161345351 is a deficient number, since it is larger than the sum of its proper divisors (9490921).

161345351 is an equidigital number, since it uses as much as digits as its factorization.

161345351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9490920.

The product of its digits is 5400, while the sum is 29.

The square root of 161345351 is about 12702.1789862999. The cubic root of 161345351 is about 544.4008802186.

It can be divided in two parts, 1613 and 45351, that added together give a palindrome (46964).

The spelling of 161345351 in words is "one hundred sixty-one million, three hundred forty-five thousand, three hundred fifty-one".