161347520 has 56 divisors (see below), whose sum is σ = 389528304. Its totient is φ = 63645696.

The previous prime is 161347489. The next prime is 161347541. The reversal of 161347520 is 25743161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19907 + ... + 26813.

Almost surely, 2^161347520 is an apocalyptic number.

161347520 is a gapful number since it is divisible by the number (10) 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 161347520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194764152).

161347520 is an abundant number, since it is smaller than the sum of its proper divisors (228180784).

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

161347520 is an equidigital number, since it uses as much as digits as its factorization.

161347520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6997 (or 6987 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 161347520 is about 12702.2643650650. The cubic root of 161347520 is about 544.4033197067.

The spelling of 161347520 in words is "one hundred sixty-one million, three hundred forty-seven thousand, five hundred twenty".