161432433 has 12 divisors (see below), whose sum is σ = 241816848. Its totient is φ = 107621460.

The previous prime is 161432431. The next prime is 161432477. The reversal of 161432433 is 334234161.

161432433 is a `hidden beast` number, since 1 + 614 + 3 + 2 + 43 + 3 = 666.

It is not a de Polignac number, because 161432433 - 2¹ = 161432431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 161432397 and 161432406.

It is not an unprimeable number, because it can be changed into a prime (161432431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331923 + ... + 332408.

It is an arithmetic number, because the mean of its divisors is an integer number (20151404).

Almost surely, 2^161432433 is an apocalyptic number.

It is an amenable number.

161432433 is a deficient number, since it is larger than the sum of its proper divisors (80384415).

161432433 is an frugal number, since it uses more digits than its factorization.

161432433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664346 (or 664334 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 161432433 is about 12705.6063609731. The cubic root of 161432433 is about 544.4988047238.

Adding to 161432433 its reverse (334234161), we get a palindrome (495666594).

The spelling of 161432433 in words is "one hundred sixty-one million, four hundred thirty-two thousand, four hundred thirty-three".