133232531 has 4 divisors (see below), whose sum is σ = 133412592. Its totient is φ = 133052472.

The previous prime is 133232527. The next prime is 133232563. The reversal of 133232531 is 135232331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133232531 - 2² = 133232527 is a prime.

It is a super-2 number, since 2×133232531² = 35501814633331922, 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 = 133232497 and 133232506.

It is not an unprimeable number, because it can be changed into a prime (133232521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88916 + ... + 90401.

It is an arithmetic number, because the mean of its divisors is an integer number (33353148).

Almost surely, 2^133232531 is an apocalyptic number.

133232531 is a deficient number, since it is larger than the sum of its proper divisors (180061).

133232531 is an equidigital number, since it uses as much as digits as its factorization.

133232531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180060.

The product of its digits is 1620, while the sum is 23.

The square root of 133232531 is about 11542.6396894298. The cubic root of 133232531 is about 510.7441795067.

Adding to 133232531 its reverse (135232331), we get a palindrome (268464862).

The spelling of 133232531 in words is "one hundred thirty-three million, two hundred thirty-two thousand, five hundred thirty-one".