133215423 has 16 divisors (see below), whose sum is σ = 194030976. Its totient is φ = 80627040.

The previous prime is 133215421. The next prime is 133215427. The reversal of 133215423 is 324512331.

It is not a de Polignac number, because 133215423 - 2¹ = 133215421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133215393 and 133215402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133215421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26640 + ... + 31242.

It is an arithmetic number, because the mean of its divisors is an integer number (12126936).

Almost surely, 2^133215423 is an apocalyptic number.

133215423 is a deficient number, since it is larger than the sum of its proper divisors (60815553).

133215423 is a wasteful number, since it uses less digits than its factorization.

133215423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5494.

The product of its digits is 2160, while the sum is 24.

The square root of 133215423 is about 11541.8985873209. The cubic root of 133215423 is about 510.7223175150.

Adding to 133215423 its reverse (324512331), we get a palindrome (457727754).

The spelling of 133215423 in words is "one hundred thirty-three million, two hundred fifteen thousand, four hundred twenty-three".