133857522 has 54 divisors (see below), whose sum is σ = 304175469. Its totient is φ = 44177400.

The previous prime is 133857517. The next prime is 133857557. The reversal of 133857522 is 225758331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 92910321 + 40947201 = 9639^2 + 6399^2 .

It is a tau number, because it is divible by the number of its divisors (54).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8181.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1325272 + ... + 1325372.

Almost surely, 2^133857522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133857522

133857522 is an abundant number, since it is smaller than the sum of its proper divisors (170317947).

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

133857522 is an frugal number, since it uses more digits than its factorization.

133857522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 106 counting only the distinct ones).

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

The square root of 133857522 is about 11569.6811537743. The cubic root of 133857522 is about 511.5415640324.

The spelling of 133857522 in words is "one hundred thirty-three million, eight hundred fifty-seven thousand, five hundred twenty-two".