161506424 has 16 divisors (see below), whose sum is σ = 303655200. Its totient is φ = 80531712.

The previous prime is 161506417. The next prime is 161506427. The reversal of 161506424 is 424605161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161506427) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 24569 + ... + 30440.

It is an arithmetic number, because the mean of its divisors is an integer number (18978450).

Almost surely, 2^161506424 is an apocalyptic number.

It is an amenable number.

161506424 is a deficient number, since it is larger than the sum of its proper divisors (142148776).

161506424 is a wasteful number, since it uses less digits than its factorization.

161506424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55382 (or 55378 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 161506424 is about 12708.5177735250. The cubic root of 161506424 is about 544.5819806108.

The spelling of 161506424 in words is "one hundred sixty-one million, five hundred six thousand, four hundred twenty-four".