133213236 has 36 divisors (see below), whose sum is σ = 336585312. Its totient is φ = 40988064.

The previous prime is 133213229. The next prime is 133213259. The reversal of 133213236 is 632312331.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30816 + ... + 34871.

It is an arithmetic number, because the mean of its divisors is an integer number (9349592).

Almost surely, 2^133213236 is an apocalyptic number.

It is an amenable number.

133213236 is an abundant number, since it is smaller than the sum of its proper divisors (203372076).

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

133213236 is a wasteful number, since it uses less digits than its factorization.

133213236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65720 (or 65705 counting only the distinct ones).

The product of its digits is 1944, while the sum is 24.

The square root of 133213236 is about 11541.8038451535. The cubic root of 133213236 is about 510.7195226539.

Adding to 133213236 its reverse (632312331), we get a palindrome (765525567).

The spelling of 133213236 in words is "one hundred thirty-three million, two hundred thirteen thousand, two hundred thirty-six".