213508538056 has 32 divisors (see below), whose sum is σ = 462411542880. Its totient is φ = 91340550400.

The previous prime is 213508538051. The next prime is 213508538119. The reversal of 213508538056 is 650835805312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 213508537997 and 213508538015.

It is not an unprimeable number, because it can be changed into a prime (213508538051) 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, 71358310 + ... + 71361301.

It is an arithmetic number, because the mean of its divisors is an integer number (14450360715).

Almost surely, 2^213508538056 is an apocalyptic number.

It is an amenable number.

213508538056 is an abundant number, since it is smaller than the sum of its proper divisors (248903004824).

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

213508538056 is a wasteful number, since it uses less digits than its factorization.

213508538056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142719645 (or 142719641 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 213508538056 in words is "two hundred thirteen billion, five hundred eight million, five hundred thirty-eight thousand, fifty-six".