133545031 has 4 divisors (see below), whose sum is σ = 133576992. Its totient is φ = 133513072.

The previous prime is 133545019. The next prime is 133545059. The reversal of 133545031 is 130545331.

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 133545031 - 2⁹ = 133544519 is a prime.

It is a super-2 number, since 2×133545031² = 35668550609581922, 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 = 133544987 and 133545005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133545011) 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, 8566 + ... + 18451.

It is an arithmetic number, because the mean of its divisors is an integer number (33394248).

Almost surely, 2^133545031 is an apocalyptic number.

133545031 is a deficient number, since it is larger than the sum of its proper divisors (31961).

133545031 is an equidigital number, since it uses as much as digits as its factorization.

133545031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31960.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 133545031 is about 11556.1685259432. The cubic root of 133545031 is about 511.1431884912.

The spelling of 133545031 in words is "one hundred thirty-three million, five hundred forty-five thousand, thirty-one".