133572528 has 30 divisors (see below), whose sum is σ = 373817964. Its totient is φ = 44524128.

The previous prime is 133572403. The next prime is 133572529. The reversal of 133572528 is 825275331.

It is a happy number.

133572528 is a `hidden beast` number, since 1 + 33 + 572 + 52 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 133572492 and 133572501.

It is not an unprimeable number, because it can be changed into a prime (133572529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 463650 + ... + 463937.

Almost surely, 2^133572528 is an apocalyptic number.

133572528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

133572528 is an abundant number, since it is smaller than the sum of its proper divisors (240245436).

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

133572528 is a wasteful number, since it uses less digits than its factorization.

133572528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927601 (or 927592 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 133572528 is about 11557.3581756386. The cubic root of 133572528 is about 511.1782676442.

The spelling of 133572528 in words is "one hundred thirty-three million, five hundred seventy-two thousand, five hundred twenty-eight".