161311470 has 32 divisors (see below), whose sum is σ = 409922208. Its totient is φ = 40485888.

The previous prime is 161311459. The next prime is 161311477. The reversal of 161311470 is 74113161.

161311470 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161311470.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161311477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157639 + ... + 158658.

It is an arithmetic number, because the mean of its divisors is an integer number (12810069).

Almost surely, 2^161311470 is an apocalyptic number.

161311470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161311470 is an abundant number, since it is smaller than the sum of its proper divisors (248610738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161311470 is a wasteful number, since it uses less digits than its factorization.

161311470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316324.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 161311470 is about 12700.8452474629. The cubic root of 161311470 is about 544.3627712031.

The spelling of 161311470 in words is "one hundred sixty-one million, three hundred eleven thousand, four hundred seventy".