161245533 has 8 divisors (see below), whose sum is σ = 226309600. Its totient is φ = 101839248.

The previous prime is 161245531. The next prime is 161245547. The reversal of 161245533 is 335542161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161245533 - 2¹ = 161245531 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 161245533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161245531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414378 + ... + 1414491.

It is an arithmetic number, because the mean of its divisors is an integer number (28288700).

Almost surely, 2^161245533 is an apocalyptic number.

It is an amenable number.

161245533 is a deficient number, since it is larger than the sum of its proper divisors (65064067).

161245533 is a wasteful number, since it uses less digits than its factorization.

161245533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828891.

The product of its digits is 10800, while the sum is 30.

The square root of 161245533 is about 12698.2492100289. The cubic root of 161245533 is about 544.2885906137.

Adding to 161245533 its reverse (335542161), we get a palindrome (496787694).

The spelling of 161245533 in words is "one hundred sixty-one million, two hundred forty-five thousand, five hundred thirty-three".