133623552 has 72 divisors (see below), whose sum is σ = 357544656. Its totient is φ = 44302336.

The previous prime is 133623541. The next prime is 133623559. The reversal of 133623552 is 255326331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133623559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197038 + ... + 197714.

It is an arithmetic number, because the mean of its divisors is an integer number (4965898).

Almost surely, 2^133623552 is an apocalyptic number.

133623552 is a gapful number since it is divisible by the number (12) 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 133623552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178772328).

133623552 is an abundant number, since it is smaller than the sum of its proper divisors (223921104).

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

133623552 is an equidigital number, since it uses as much as digits as its factorization.

133623552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953 (or 939 counting only the distinct ones).

The product of its digits is 16200, while the sum is 30.

The square root of 133623552 is about 11559.5653897541. The cubic root of 133623552 is about 511.2433484906.

Adding to 133623552 its reverse (255326331), we get a palindrome (388949883).

The spelling of 133623552 in words is "one hundred thirty-three million, six hundred twenty-three thousand, five hundred fifty-two".