161553244 has 12 divisors (see below), whose sum is σ = 299348784. Its totient is φ = 76025024.

The previous prime is 161553233. The next prime is 161553263. The reversal of 161553244 is 442355161.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187824 + ... + 1187959.

It is an arithmetic number, because the mean of its divisors is an integer number (24945732).

Almost surely, 2^161553244 is an apocalyptic number.

It is an amenable number.

161553244 is a deficient number, since it is larger than the sum of its proper divisors (137795540).

161553244 is a wasteful number, since it uses less digits than its factorization.

161553244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375804 (or 2375802 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 161553244 is about 12710.3597116683. The cubic root of 161553244 is about 544.6345994979.

The spelling of 161553244 in words is "one hundred sixty-one million, five hundred fifty-three thousand, two hundred forty-four".