161233365 has 16 divisors (see below), whose sum is σ = 258231168. Its totient is φ = 85905216.

The previous prime is 161233363. The next prime is 161233399. The reversal of 161233365 is 563332161.

It is a happy number.

It is not a de Polignac number, because 161233365 - 2¹ = 161233363 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161233363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11944 + ... + 21566.

It is an arithmetic number, because the mean of its divisors is an integer number (16139448).

Almost surely, 2^161233365 is an apocalyptic number.

161233365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161233365 is a deficient number, since it is larger than the sum of its proper divisors (96997803).

161233365 is a wasteful number, since it uses less digits than its factorization.

161233365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10748.

The product of its digits is 9720, while the sum is 30.

The square root of 161233365 is about 12697.7700798211. The cubic root of 161233365 is about 544.2748991333.

The spelling of 161233365 in words is "one hundred sixty-one million, two hundred thirty-three thousand, three hundred sixty-five".