133131545 has 8 divisors (see below), whose sum is σ = 160150920. Its totient is φ = 106243200.

The previous prime is 133131541. The next prime is 133131563. The reversal of 133131545 is 545131331.

It can be written as a sum of positive squares in 4 ways, for example, as 62789776 + 70341769 = 7924^2 + 8387^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133131545 - 2² = 133131541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133131541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30506 + ... + 34595.

It is an arithmetic number, because the mean of its divisors is an integer number (20018865).

Almost surely, 2^133131545 is an apocalyptic number.

It is an amenable number.

133131545 is a deficient number, since it is larger than the sum of its proper divisors (27019375).

133131545 is an equidigital number, since it uses as much as digits as its factorization.

133131545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65515.

The product of its digits is 2700, while the sum is 26.

The square root of 133131545 is about 11538.2643842131. The cubic root of 133131545 is about 510.6151043018.

Adding to 133131545 its reverse (545131331), we get a palindrome (678262876).

The spelling of 133131545 in words is "one hundred thirty-three million, one hundred thirty-one thousand, five hundred forty-five".