135212023 has 12 divisors (see below), whose sum is σ = 139855800. Its totient is φ = 130717152.

The previous prime is 135212003. The next prime is 135212029. The reversal of 135212023 is 320212531.

It is not a de Polignac number, because 135212023 - 2⁵ = 135211991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135212029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 387253 + ... + 387601.

It is an arithmetic number, because the mean of its divisors is an integer number (11654650).

Almost surely, 2^135212023 is an apocalyptic number.

135212023 is a deficient number, since it is larger than the sum of its proper divisors (4643777).

135212023 is an equidigital number, since it uses as much as digits as its factorization.

135212023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 135212023 is about 11628.0704762226. The cubic root of 135212023 is about 513.2612022204.

Adding to 135212023 its reverse (320212531), we get a palindrome (455424554).

The spelling of 135212023 in words is "one hundred thirty-five million, two hundred twelve thousand, twenty-three".