161530512 has 160 divisors (see below), whose sum is σ = 497218176. Its totient is φ = 44544000.

The previous prime is 161530483. The next prime is 161530519. The reversal of 161530512 is 215035161.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (161530519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 693148 + ... + 693380.

Almost surely, 2^161530512 is an apocalyptic number.

161530512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161530512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248609088).

161530512 is an abundant number, since it is smaller than the sum of its proper divisors (335687664).

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

161530512 is a wasteful number, since it uses less digits than its factorization.

161530512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 161530512 is about 12709.4654490266. The cubic root of 161530512 is about 544.6090532979.

Adding to 161530512 its reverse (215035161), we get a palindrome (376565673).

The spelling of 161530512 in words is "one hundred sixty-one million, five hundred thirty thousand, five hundred twelve".