133481519 has 4 divisors (see below), whose sum is σ = 138084360. Its totient is φ = 128878680.

The previous prime is 133481483. The next prime is 133481539. The reversal of 133481519 is 915184331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133481519 is a prime.

It is a super-2 number, since 2×133481519² = 35634631829094722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133481539) 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, 2301377 + ... + 2301434.

It is an arithmetic number, because the mean of its divisors is an integer number (34521090).

Almost surely, 2^133481519 is an apocalyptic number.

133481519 is a deficient number, since it is larger than the sum of its proper divisors (4602841).

133481519 is an equidigital number, since it uses as much as digits as its factorization.

133481519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602840.

The product of its digits is 12960, while the sum is 35.

The square root of 133481519 is about 11553.4202295251. The cubic root of 133481519 is about 511.0621449817.

The spelling of 133481519 in words is "one hundred thirty-three million, four hundred eighty-one thousand, five hundred nineteen".