133613616 has 40 divisors (see below), whose sum is σ = 345607344. Its totient is φ = 44481280.

The previous prime is 133613593. The next prime is 133613633. The reversal of 133613616 is 616316331.

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

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, 55510 + ... + 57866.

Almost surely, 2^133613616 is an apocalyptic number.

133613616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133613616 is an abundant number, since it is smaller than the sum of its proper divisors (211993728).

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

133613616 is a wasteful number, since it uses less digits than its factorization.

133613616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3549 (or 3543 counting only the distinct ones).

The product of its digits is 5832, while the sum is 30.

The square root of 133613616 is about 11559.1356078212. The cubic root of 133613616 is about 511.2306764735.

Adding to 133613616 its reverse (616316331), we get a palindrome (749929947).

The spelling of 133613616 in words is "one hundred thirty-three million, six hundred thirteen thousand, six hundred sixteen".