133445536 has 48 divisors (see below), whose sum is σ = 304093440. Its totient is φ = 56459520.

The previous prime is 133445509. The next prime is 133445567. The reversal of 133445536 is 635544331.

It is a super-2 number, since 2×133445536² = 35615422156654592, which contains 22 as substring.

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, 13926 + ... + 21466.

It is an arithmetic number, because the mean of its divisors is an integer number (6335280).

Almost surely, 2^133445536 is an apocalyptic number.

133445536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133445536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152046720).

133445536 is an abundant number, since it is smaller than the sum of its proper divisors (170647904).

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

133445536 is an equidigital number, since it uses as much as digits as its factorization.

133445536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7637 (or 7629 counting only the distinct ones).

The product of its digits is 64800, while the sum is 34.

The square root of 133445536 is about 11551.8628800726. The cubic root of 133445536 is about 511.0162180200.

Adding to 133445536 its reverse (635544331), we get a palindrome (768989867).

The spelling of 133445536 in words is "one hundred thirty-three million, four hundred forty-five thousand, five hundred thirty-six".