133245031 has 4 divisors (see below), whose sum is σ = 141082992. Its totient is φ = 125407072.

The previous prime is 133245019. The next prime is 133245071. The reversal of 133245031 is 130542331.

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 133245031 - 2⁵ = 133244999 is a prime.

It is a super-2 number, since 2×133245031² = 35508476572381922, 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 = 133244993 and 133245011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133245001) 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, 3918955 + ... + 3918988.

It is an arithmetic number, because the mean of its divisors is an integer number (35270748).

Almost surely, 2^133245031 is an apocalyptic number.

133245031 is a deficient number, since it is larger than the sum of its proper divisors (7837961).

133245031 is an equidigital number, since it uses as much as digits as its factorization.

133245031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7837960.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 133245031 is about 11543.1811473268. The cubic root of 133245031 is about 510.7601518385.

Adding to 133245031 its reverse (130542331), we get a palindrome (263787362).

The spelling of 133245031 in words is "one hundred thirty-three million, two hundred forty-five thousand, thirty-one".