161521033235 has 8 divisors (see below), whose sum is σ = 196160484240. Its totient is φ = 127659997024.

The previous prime is 161521033231. The next prime is 161521033253. The reversal of 161521033235 is 532330125161.

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

It is a cyclic number.

It is not a de Polignac number, because 161521033235 - 2² = 161521033231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161521033231) 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, 194603240 + ... + 194604069.

It is an arithmetic number, because the mean of its divisors is an integer number (24520060530).

Almost surely, 2^161521033235 is an apocalyptic number.

161521033235 is a deficient number, since it is larger than the sum of its proper divisors (34639451005).

161521033235 is an equidigital number, since it uses as much as digits as its factorization.

161521033235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389207397.

The product of its (nonzero) digits is 16200, while the sum is 32.

Adding to 161521033235 its reverse (532330125161), we get a palindrome (693851158396).

The spelling of 161521033235 in words is "one hundred sixty-one billion, five hundred twenty-one million, thirty-three thousand, two hundred thirty-five".