161233120 has 48 divisors (see below), whose sum is σ = 381755808. Its totient is φ = 64350720.

The previous prime is 161233081. The next prime is 161233133. The reversal of 161233120 is 21332161.

It is a super-2 number, since 2×161233120² = 51992237969868800, which contains 22 as substring.

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, 100162 + ... + 101758.

It is an arithmetic number, because the mean of its divisors is an integer number (7953246).

Almost surely, 2^161233120 is an apocalyptic number.

161233120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161233120 is an abundant number, since it is smaller than the sum of its proper divisors (220522688).

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

161233120 is a wasteful number, since it uses less digits than its factorization.

161233120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243 (or 2235 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 161233120 is about 12697.7604324542. The cubic root of 161233120 is about 544.2746234513.

Adding to 161233120 its reverse (21332161), we get a palindrome (182565281).

The spelling of 161233120 in words is "one hundred sixty-one million, two hundred thirty-three thousand, one hundred twenty".