161833421 has 8 divisors (see below), whose sum is σ = 171826560. Its totient is φ = 151892928.

The previous prime is 161833403. The next prime is 161833429. The reversal of 161833421 is 124338161.

161833421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161833421 - 2²² = 157639117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161833429) 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, 6731 + ... + 19208.

It is an arithmetic number, because the mean of its divisors is an integer number (21478320).

Almost surely, 2^161833421 is an apocalyptic number.

It is an amenable number.

161833421 is a deficient number, since it is larger than the sum of its proper divisors (9993139).

161833421 is a wasteful number, since it uses less digits than its factorization.

161833421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26323.

The product of its digits is 3456, while the sum is 29.

The square root of 161833421 is about 12721.3765371519. The cubic root of 161833421 is about 544.9492655407.

The spelling of 161833421 in words is "one hundred sixty-one million, eight hundred thirty-three thousand, four hundred twenty-one".