161055552 has 336 divisors, whose sum is σ = 562904640. Its totient is φ = 40255488.

The previous prime is 161055551. The next prime is 161055563. The reversal of 161055552 is 255550161.

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161055551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3038758 + ... + 3038810.

Almost surely, 2^161055552 is an apocalyptic number.

161055552 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 161055552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281452320).

161055552 is an abundant number, since it is smaller than the sum of its proper divisors (401849088).

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

161055552 is a wasteful number, since it uses less digits than its factorization.

161055552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 161055552 is about 12690.7664071166. The cubic root of 161055552 is about 544.0747446317.

The spelling of 161055552 in words is "one hundred sixty-one million, fifty-five thousand, five hundred fifty-two".