135423230521 has 8 divisors (see below), whose sum is σ = 137061880704. Its totient is φ = 133784748240.

The previous prime is 135423230513. The next prime is 135423230539. The reversal of 135423230521 is 125032324531.

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 135423230521 - 2³ = 135423230513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135423230561) 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, 2519095 + ... + 2572291.

It is an arithmetic number, because the mean of its divisors is an integer number (17132735088).

Almost surely, 2^135423230521 is an apocalyptic number.

It is an amenable number.

135423230521 is a deficient number, since it is larger than the sum of its proper divisors (1638650183).

135423230521 is an equidigital number, since it uses as much as digits as its factorization.

135423230521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83951.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 135423230521 in words is "one hundred thirty-five billion, four hundred twenty-three million, two hundred thirty thousand, five hundred twenty-one".