161743525 has 24 divisors (see below), whose sum is σ = 213093504. Its totient is φ = 121363200.

The previous prime is 161743493. The next prime is 161743531. The reversal of 161743525 is 525347161.

It is not a de Polignac number, because 161743525 - 2⁵ = 161743493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182734 + ... + 183616.

It is an arithmetic number, because the mean of its divisors is an integer number (8878896).

Almost surely, 2^161743525 is an apocalyptic number.

It is an amenable number.

161743525 is a deficient number, since it is larger than the sum of its proper divisors (51349979).

161743525 is a wasteful number, since it uses less digits than its factorization.

161743525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341 (or 1336 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 161743525 is about 12717.8427809122. The cubic root of 161743525 is about 544.8483431797.

The spelling of 161743525 in words is "one hundred sixty-one million, seven hundred forty-three thousand, five hundred twenty-five".