193533138 has 30 divisors (see below), whose sum is σ = 434054709. Its totient is φ = 64452024.

The previous prime is 193533121. The next prime is 193533191. The reversal of 193533138 is 831335391.

It is a happy number.

193533138 is a `hidden beast` number, since 1 + 93 + 533 + 1 + 38 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 119968209 + 73564929 = 10953^2 + 8577^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=9837.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 176520 + ... + 177612.

Almost surely, 2^193533138 is an apocalyptic number.

193533138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

193533138 is an abundant number, since it is smaller than the sum of its proper divisors (240521571).

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

193533138 is an frugal number, since it uses more digits than its factorization.

193533138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200 (or 1098 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 193533138 is about 13911.6188130641. The cubic root of 193533138 is about 578.4312921036.

The spelling of 193533138 in words is "one hundred ninety-three million, five hundred thirty-three thousand, one hundred thirty-eight".