161217600 has 84 divisors (see below), whose sum is σ = 528943824. Its totient is φ = 42990080.

The previous prime is 161217599. The next prime is 161217607. The reversal of 161217600 is 6712161.

161217600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161217600² = 51982229099520000, which contains 22 as substring.

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 (161217607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11994 + ... + 21593.

Almost surely, 2^161217600 is an apocalyptic number.

161217600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161217600 is an abundant number, since it is smaller than the sum of its proper divisors (367726224).

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

161217600 is a wasteful number, since it uses less digits than its factorization.

161217600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33612 (or 33597 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 161217600 is about 12697.1492863556. The cubic root of 161217600 is about 544.2571592702.

Adding to 161217600 its reverse (6712161), we get a palindrome (167929761).

The spelling of 161217600 in words is "one hundred sixty-one million, two hundred seventeen thousand, six hundred".