213423433128 has 48 divisors (see below), whose sum is σ = 578083084020. Its totient is φ = 71133601536.

The previous prime is 213423433103. The next prime is 213423433159. The reversal of 213423433128 is 821334324312.

213423433128 is a `hidden beast` number, since 213 + 4 + 2 + 3 + 433 + 1 + 2 + 8 = 666.

213423433128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 209509429284 + 3914003844 = 457722^2 + 62562^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 213423433092 and 213423433101.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 548500 + ... + 853052.

Almost surely, 2^213423433128 is an apocalyptic number.

It is an amenable number.

213423433128 is an abundant number, since it is smaller than the sum of its proper divisors (364659650892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213423433128 is a wasteful number, since it uses less digits than its factorization.

213423433128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314298 (or 314291 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The spelling of 213423433128 in words is "two hundred thirteen billion, four hundred twenty-three million, four hundred thirty-three thousand, one hundred twenty-eight".