133515331 has 16 divisors (see below), whose sum is σ = 143700480. Its totient is φ = 123610240.

The previous prime is 133515323. The next prime is 133515341.

133515331 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 133515331 - 2³ = 133515323 is a prime.

It is a super-2 number, since 2×133515331² = 35652687224079122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133515296 and 133515305.

It is not an unprimeable number, because it can be changed into a prime (133515341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371730 + ... + 372088.

It is an arithmetic number, because the mean of its divisors is an integer number (8981280).

Almost surely, 2^133515331 is an apocalyptic number.

133515331 is a deficient number, since it is larger than the sum of its proper divisors (10185149).

133515331 is a wasteful number, since it uses less digits than its factorization.

133515331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674.

The product of its digits is 2025, while the sum is 25.

The square root of 133515331 is about 11554.8834264998. The cubic root of 133515331 is about 511.1052934628.

The spelling of 133515331 in words is "one hundred thirty-three million, five hundred fifteen thousand, three hundred thirty-one".