161345013 has 4 divisors (see below), whose sum is σ = 215126688. Its totient is φ = 107563340.

The previous prime is 161344993. The next prime is 161345027. The reversal of 161345013 is 310543161.

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 161345013 - 2¹⁰ = 161343989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161345033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26890833 + ... + 26890838.

It is an arithmetic number, because the mean of its divisors is an integer number (53781672).

Almost surely, 2^161345013 is an apocalyptic number.

It is an amenable number.

161345013 is a deficient number, since it is larger than the sum of its proper divisors (53781675).

161345013 is an equidigital number, since it uses as much as digits as its factorization.

161345013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53781674.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 161345013 is about 12702.1656814891. The cubic root of 161345013 is about 544.4005000659.

Adding to 161345013 its reverse (310543161), we get a palindrome (471888174).

The spelling of 161345013 in words is "one hundred sixty-one million, three hundred forty-five thousand, thirteen".