161431485 has 16 divisors (see below), whose sum is σ = 258448320. Its totient is φ = 86044160.

The previous prime is 161431483. The next prime is 161431519. The reversal of 161431485 is 584134161.

It is not a de Polignac number, because 161431485 - 2¹ = 161431483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161431483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43846 + ... + 47384.

It is an arithmetic number, because the mean of its divisors is an integer number (16153020).

Almost surely, 2^161431485 is an apocalyptic number.

161431485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161431485 is a deficient number, since it is larger than the sum of its proper divisors (97016835).

161431485 is a wasteful number, since it uses less digits than its factorization.

161431485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6588.

The product of its digits is 11520, while the sum is 33.

The square root of 161431485 is about 12705.5690545524. The cubic root of 161431485 is about 544.4977388788.

The spelling of 161431485 in words is "one hundred sixty-one million, four hundred thirty-one thousand, four hundred eighty-five".