161231384 has 8 divisors (see below), whose sum is σ = 302308860. Its totient is φ = 80615688.

The previous prime is 161231351. The next prime is 161231407. The reversal of 161231384 is 483132161.

161231384 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10076954 + ... + 10076969.

Almost surely, 2^161231384 is an apocalyptic number.

It is an amenable number.

161231384 is a deficient number, since it is larger than the sum of its proper divisors (141077476).

161231384 is a wasteful number, since it uses less digits than its factorization.

161231384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20153929 (or 20153925 counting only the distinct ones).

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

The square root of 161231384 is about 12697.6920737589. The cubic root of 161231384 is about 544.2726700393.

The spelling of 161231384 in words is "one hundred sixty-one million, two hundred thirty-one thousand, three hundred eighty-four".