133537472 has 56 divisors (see below), whose sum is σ = 280873200. Its totient is φ = 62816256.

The previous prime is 133537463. The next prime is 133537487. The reversal of 133537472 is 274735331.

It is a super-3 number, since 3×133537472³ (a number of 25 digits) contains 333 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, 234404 + ... + 234972.

Almost surely, 2^133537472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133537472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140436600).

133537472 is an abundant number, since it is smaller than the sum of its proper divisors (147335728).

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

133537472 is a wasteful number, since it uses less digits than its factorization.

133537472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 783 counting only the distinct ones).

The product of its digits is 52920, while the sum is 35.

The square root of 133537472 is about 11555.8414665484. The cubic root of 133537472 is about 511.1335442930.

The spelling of 133537472 in words is "one hundred thirty-three million, five hundred thirty-seven thousand, four hundred seventy-two".