133100001 has 6 divisors (see below), whose sum is σ = 192255570. Its totient is φ = 88733328.

The previous prime is 133099973. The next prime is 133100017. The reversal of 133100001 is 100001331.

It can be written as a sum of positive squares in only one way, i.e., 84658401 + 48441600 = 9201^2 + 6960^2 .

It is not a de Polignac number, because 133100001 - 2⁵ = 133099969 is a prime.

It is a super-2 number, since 2×133100001² = 35431220532400002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 14788889 = 133100001 / (1 + 3 + 3 + 1 + 0 + 0 + 0 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (133100041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7394436 + ... + 7394453.

It is an arithmetic number, because the mean of its divisors is an integer number (32042595).

Almost surely, 2^133100001 is an apocalyptic number.

It is an amenable number.

133100001 is a deficient number, since it is larger than the sum of its proper divisors (59155569).

133100001 is a wasteful number, since it uses less digits than its factorization.

133100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14788895 (or 14788892 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 9.

The square root of 133100001 is about 11536.8973732109. The cubic root of 133100001 is about 510.5747729761.

Adding to 133100001 its reverse (100001331), we get a palindrome (233101332).

The spelling of 133100001 in words is "one hundred thirty-three million, one hundred thousand, one".