161131343 has 4 divisors (see below), whose sum is σ = 169611960. Its totient is φ = 152650728.

The previous prime is 161131339. The next prime is 161131349. The reversal of 161131343 is 343131161.

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

It is a cyclic number.

It is not a de Polignac number, because 161131343 - 2² = 161131339 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 (161131349) 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, 4240280 + ... + 4240317.

It is an arithmetic number, because the mean of its divisors is an integer number (42402990).

Almost surely, 2^161131343 is an apocalyptic number.

161131343 is a deficient number, since it is larger than the sum of its proper divisors (8480617).

161131343 is an equidigital number, since it uses as much as digits as its factorization.

161131343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8480616.

The product of its digits is 648, while the sum is 23.

The square root of 161131343 is about 12693.7521245690. The cubic root of 161131343 is about 544.1600764768.

The spelling of 161131343 in words is "one hundred sixty-one million, one hundred thirty-one thousand, three hundred forty-three".