133712538 has 32 divisors (see below), whose sum is σ = 282104640. Its totient is φ = 42134400.

The previous prime is 133712507. The next prime is 133712543. The reversal of 133712538 is 835217331.

It is a junction number, because it is equal to n+sod(n) for n = 133712499 and 133712508.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69388 + ... + 71288.

It is an arithmetic number, because the mean of its divisors is an integer number (8815770).

Almost surely, 2^133712538 is an apocalyptic number.

133712538 is an abundant number, since it is smaller than the sum of its proper divisors (148392102).

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

133712538 is a wasteful number, since it uses less digits than its factorization.

133712538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2542.

The product of its digits is 15120, while the sum is 33.

The square root of 133712538 is about 11563.4137692984. The cubic root of 133712538 is about 511.3568100397.

Adding to 133712538 its reverse (835217331), we get a palindrome (968929869).

The spelling of 133712538 in words is "one hundred thirty-three million, seven hundred twelve thousand, five hundred thirty-eight".