161532472 has 8 divisors (see below), whose sum is σ = 302873400. Its totient is φ = 80766232.

The previous prime is 161532463. The next prime is 161532517. The reversal of 161532472 is 274235161.

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, 10095772 + ... + 10095787.

It is an arithmetic number, because the mean of its divisors is an integer number (37859175).

Almost surely, 2^161532472 is an apocalyptic number.

It is an amenable number.

161532472 is a deficient number, since it is larger than the sum of its proper divisors (141340928).

161532472 is a wasteful number, since it uses less digits than its factorization.

161532472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20191565 (or 20191561 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 161532472 is about 12709.5425566776. The cubic root of 161532472 is about 544.6112560385.

The spelling of 161532472 in words is "one hundred sixty-one million, five hundred thirty-two thousand, four hundred seventy-two".