133225031 has 4 divisors (see below), whose sum is σ = 136474464. Its totient is φ = 129975600.

The previous prime is 133224997. The next prime is 133225033. The reversal of 133225031 is 130522331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130522331 = 487 ⋅268013.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133225031 is a prime.

It is a super-2 number, since 2×133225031² = 35497817769901922, 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 = 133224994 and 133225012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133225033) 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, 1624655 + ... + 1624736.

It is an arithmetic number, because the mean of its divisors is an integer number (34118616).

Almost surely, 2^133225031 is an apocalyptic number.

133225031 is a deficient number, since it is larger than the sum of its proper divisors (3249433).

133225031 is an equidigital number, since it uses as much as digits as its factorization.

133225031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249432.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 133225031 is about 11542.3148024995. The cubic root of 133225031 is about 510.7345956280.

Adding to 133225031 its reverse (130522331), we get a palindrome (263747362).

The spelling of 133225031 in words is "one hundred thirty-three million, two hundred twenty-five thousand, thirty-one".