165431201200 has 30 divisors (see below), whose sum is σ = 397448461844. Its totient is φ = 66172480320.

The previous prime is 165431201189. The next prime is 165431201209. The reversal of 165431201200 is 2102134561.

It is a happy number.

165431201200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (165431201209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206788602 + ... + 206789401.

Almost surely, 2^165431201200 is an apocalyptic number.

165431201200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165431201200 is an abundant number, since it is smaller than the sum of its proper divisors (232017260644).

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

165431201200 is a wasteful number, since it uses less digits than its factorization.

165431201200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413578021 (or 413578010 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 165431201200 its reverse (2102134561), we get a palindrome (167533335761).

The spelling of 165431201200 in words is "one hundred sixty-five billion, four hundred thirty-one million, two hundred one thousand, two hundred".