133302531 has 16 divisors (see below), whose sum is σ = 185565600. Its totient is φ = 85010688.

The previous prime is 133302517. The next prime is 133302557. The reversal of 133302531 is 135203331.

It is not a de Polignac number, because 133302531 - 2¹⁰ = 133301507 is a prime.

It is a super-2 number, since 2×133302531² = 35539129542011922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133302498 and 133302507.

It is not an unprimeable number, because it can be changed into a prime (133302431) 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, 2455 + ... + 16511.

It is an arithmetic number, because the mean of its divisors is an integer number (11597850).

Almost surely, 2^133302531 is an apocalyptic number.

133302531 is a deficient number, since it is larger than the sum of its proper divisors (52263069).

133302531 is a wasteful number, since it uses less digits than its factorization.

133302531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14198.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 133302531 is about 11545.6715265939. The cubic root of 133302531 is about 510.8336117016.

Adding to 133302531 its reverse (135203331), we get a palindrome (268505862).

The spelling of 133302531 in words is "one hundred thirty-three million, three hundred two thousand, five hundred thirty-one".