161632243 has 8 divisors (see below), whose sum is σ = 175766112. Its totient is φ = 148012416.

The previous prime is 161632241. The next prime is 161632279. The reversal of 161632243 is 342236161.

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 161632243 - 2¹ = 161632241 is a prime.

It is a super-2 number, since 2×161632243² = 52249963954422098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161632241) 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, 127855 + ... + 129112.

It is an arithmetic number, because the mean of its divisors is an integer number (21970764).

Almost surely, 2^161632243 is an apocalyptic number.

161632243 is a deficient number, since it is larger than the sum of its proper divisors (14133869).

161632243 is a wasteful number, since it uses less digits than its factorization.

161632243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257021.

The product of its digits is 5184, while the sum is 28.

The square root of 161632243 is about 12713.4669937040. The cubic root of 161632243 is about 544.7233598687.

The spelling of 161632243 in words is "one hundred sixty-one million, six hundred thirty-two thousand, two hundred forty-three".