133523401 has 8 divisors (see below), whose sum is σ = 145796544. Its totient is φ = 121272720.

The previous prime is 133523387. The next prime is 133523413. The reversal of 133523401 is 104325331.

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 133523401 - 2¹⁵ = 133490633 is a prime.

It is a super-2 number, since 2×133523401² = 35656997229213602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133523501) 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, 8340 + ... + 18346.

It is an arithmetic number, because the mean of its divisors is an integer number (18224568).

Almost surely, 2^133523401 is an apocalyptic number.

133523401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133523401 is a deficient number, since it is larger than the sum of its proper divisors (12273143).

133523401 is a wasteful number, since it uses less digits than its factorization.

133523401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11231.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 133523401 is about 11555.2326242270. The cubic root of 133523401 is about 511.1155907487.

Adding to 133523401 its reverse (104325331), we get a palindrome (237848732).

The spelling of 133523401 in words is "one hundred thirty-three million, five hundred twenty-three thousand, four hundred one".