161243470 has 32 divisors (see below), whose sum is σ = 310386816. Its totient is φ = 60096000.

The previous prime is 161243413. The next prime is 161243477. The reversal of 161243470 is 74342161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161243477) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12475 + ... + 21865.

It is an arithmetic number, because the mean of its divisors is an integer number (9699588).

Almost surely, 2^161243470 is an apocalyptic number.

161243470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161243470 is a deficient number, since it is larger than the sum of its proper divisors (149143346).

161243470 is a wasteful number, since it uses less digits than its factorization.

161243470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9516.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 161243470 is about 12698.1679780983. The cubic root of 161243470 is about 544.2862693667.

The spelling of 161243470 in words is "one hundred sixty-one million, two hundred forty-three thousand, four hundred seventy".