161371375 has 16 divisors (see below), whose sum is σ = 219701664. Its totient is φ = 117360000.

The previous prime is 161371333. The next prime is 161371403. The reversal of 161371375 is 573173161.

It is not a de Polignac number, because 161371375 - 2²⁷ = 27153647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161371375.

It is a congruent number.

It is an unprimeable number.

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, 57306 + ... + 60055.

It is an arithmetic number, because the mean of its divisors is an integer number (13731354).

Almost surely, 2^161371375 is an apocalyptic number.

161371375 is a deficient number, since it is larger than the sum of its proper divisors (58330289).

161371375 is a wasteful number, since it uses less digits than its factorization.

161371375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117387 (or 117377 counting only the distinct ones).

The product of its digits is 13230, while the sum is 34.

The square root of 161371375 is about 12703.2033361668. The cubic root of 161371375 is about 544.4301481353.

It can be divided in two parts, 16 and 1371375, that multiplied together give a triangular number (21942000 = T₆₆₂₄).

The spelling of 161371375 in words is "one hundred sixty-one million, three hundred seventy-one thousand, three hundred seventy-five".