161034133 has 4 divisors (see below), whose sum is σ = 173421388. Its totient is φ = 148646880.

The previous prime is 161034127. The next prime is 161034143. The reversal of 161034133 is 331430161.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10284849 + 150749284 = 3207^2 + 12278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161034133 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 (161034113) 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, 6193608 + ... + 6193633.

It is an arithmetic number, because the mean of its divisors is an integer number (43355347).

Almost surely, 2^161034133 is an apocalyptic number.

161034133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161034133 is a deficient number, since it is larger than the sum of its proper divisors (12387255).

161034133 is a wasteful number, since it uses less digits than its factorization.

161034133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12387254.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 161034133 is about 12689.9224977933. The cubic root of 161034133 is about 544.0506244789.

Adding to 161034133 its reverse (331430161), we get a palindrome (492464294).

The spelling of 161034133 in words is "one hundred sixty-one million, thirty-four thousand, one hundred thirty-three".