161433430 has 32 divisors (see below), whose sum is σ = 310314240. Its totient is φ = 60332160.

The previous prime is 161433409. The next prime is 161433439. The reversal of 161433430 is 34334161.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 161433395 and 161433404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161433439) 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, 12 + ... + 17968.

It is an arithmetic number, because the mean of its divisors is an integer number (9697320).

Almost surely, 2^161433430 is an apocalyptic number.

161433430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161433430 is a deficient number, since it is larger than the sum of its proper divisors (148880810).

161433430 is a wasteful number, since it uses less digits than its factorization.

161433430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18024.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 161433430 is about 12705.6455955611. The cubic root of 161433430 is about 544.4999256555.

Adding to 161433430 its reverse (34334161), we get a palindrome (195767591).

The spelling of 161433430 in words is "one hundred sixty-one million, four hundred thirty-three thousand, four hundred thirty".