133815745 has 8 divisors (see below), whose sum is σ = 183518784. Its totient is φ = 91759344.

The previous prime is 133815743. The next prime is 133815751. The reversal of 133815745 is 547518331.

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

It is a cyclic number.

It is not a de Polignac number, because 133815745 - 2¹ = 133815743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133815743) 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, 1911619 + ... + 1911688.

It is an arithmetic number, because the mean of its divisors is an integer number (22939848).

Almost surely, 2^133815745 is an apocalyptic number.

It is an amenable number.

133815745 is a deficient number, since it is larger than the sum of its proper divisors (49703039).

133815745 is an equidigital number, since it uses as much as digits as its factorization.

133815745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3823319.

The product of its digits is 50400, while the sum is 37.

The square root of 133815745 is about 11567.8755612256. The cubic root of 133815745 is about 511.4883410352.

The spelling of 133815745 in words is "one hundred thirty-three million, eight hundred fifteen thousand, seven hundred forty-five".