133501001 has 4 divisors (see below), whose sum is σ = 135689604. Its totient is φ = 131312400.

The previous prime is 133500959. The next prime is 133501031. The reversal of 133501001 is 100105331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44689225 + 88811776 = 6685^2 + 9424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133501001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133501031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1094210 + ... + 1094331.

It is an arithmetic number, because the mean of its divisors is an integer number (33922401).

Almost surely, 2^133501001 is an apocalyptic number.

It is an amenable number.

133501001 is a deficient number, since it is larger than the sum of its proper divisors (2188603).

133501001 is an equidigital number, since it uses as much as digits as its factorization.

133501001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188602.

The product of its (nonzero) digits is 45, while the sum is 14.

The square root of 133501001 is about 11554.2633257166. The cubic root of 133501001 is about 511.0870074207.

Adding to 133501001 its reverse (100105331), we get a palindrome (233606332).

The spelling of 133501001 in words is "one hundred thirty-three million, five hundred one thousand, one".