133515997 has 8 divisors (see below), whose sum is σ = 137695680. Its totient is φ = 129400320.

The previous prime is 133515979. The next prime is 133516001. The reversal of 133515997 is 799515331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133515997 - 2¹¹ = 133513949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133515937) 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, 11748 + ... + 20125.

It is an arithmetic number, because the mean of its divisors is an integer number (17211960).

Almost surely, 2^133515997 is an apocalyptic number.

It is an amenable number.

133515997 is a deficient number, since it is larger than the sum of its proper divisors (4179683).

133515997 is an equidigital number, since it uses as much as digits as its factorization.

133515997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32003.

The product of its digits is 127575, while the sum is 43.

The square root of 133515997 is about 11554.9122454478. The cubic root of 133515997 is about 511.1061432917.

The spelling of 133515997 in words is "one hundred thirty-three million, five hundred fifteen thousand, nine hundred ninety-seven".