133315131 has 4 divisors (see below), whose sum is σ = 177753512. Its totient is φ = 88876752.

The previous prime is 133315121. The next prime is 133315141. The reversal of 133315131 is 131513331.

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

It is an interprime number because it is at equal distance from previous prime (133315121) and next prime (133315141).

It is not a de Polignac number, because 133315131 - 2⁵ = 133315099 is a prime.

It is a super-2 number, since 2×133315131² = 35545848307094322, 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 = 133315098 and 133315107.

It is not an unprimeable number, because it can be changed into a prime (133315121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22219186 + ... + 22219191.

It is an arithmetic number, because the mean of its divisors is an integer number (44438378).

Almost surely, 2^133315131 is an apocalyptic number.

133315131 is a deficient number, since it is larger than the sum of its proper divisors (44438381).

133315131 is an equidigital number, since it uses as much as digits as its factorization.

133315131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44438380.

The product of its digits is 405, while the sum is 21.

The square root of 133315131 is about 11546.2171727367. The cubic root of 133315131 is about 510.8497061715.

Adding to 133315131 its reverse (131513331), we get a palindrome (264828462).

The spelling of 133315131 in words is "one hundred thirty-three million, three hundred fifteen thousand, one hundred thirty-one".