161039525 has 24 divisors (see below), whose sum is σ = 205403520. Its totient is φ = 125199360.

The previous prime is 161039507. The next prime is 161039561. The reversal of 161039525 is 525930161.

It is a de Polignac number, because none of the positive numbers 2^k-161039525 is a prime.

It is a super-2 number, since 2×161039525² = 51867457224451250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161039491 and 161039500.

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, 131717 + ... + 132933.

It is an arithmetic number, because the mean of its divisors is an integer number (8558480).

Almost surely, 2^161039525 is an apocalyptic number.

It is an amenable number.

161039525 is a deficient number, since it is larger than the sum of its proper divisors (44363995).

161039525 is a wasteful number, since it uses less digits than its factorization.

161039525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373 (or 1368 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 161039525 is about 12690.1349480610. The cubic root of 161039525 is about 544.0566966661.

Adding to 161039525 its reverse (525930161), we get a palindrome (686969686).

The spelling of 161039525 in words is "one hundred sixty-one million, thirty-nine thousand, five hundred twenty-five".