213158721850 has 24 divisors (see below), whose sum is σ = 396529986528. Its totient is φ = 85251711600.

The previous prime is 213158721829. The next prime is 213158721857. The reversal of 213158721850 is 58127851312.

It is a junction number, because it is equal to n+sod(n) for n = 213158721797 and 213158721806.

It is not an unprimeable number, because it can be changed into a prime (213158721857) 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, 75787 + ... + 657313.

It is an arithmetic number, because the mean of its divisors is an integer number (16522082772).

Almost surely, 2^213158721850 is an apocalyptic number.

213158721850 is a deficient number, since it is larger than the sum of its proper divisors (183371264678).

213158721850 is a wasteful number, since it uses less digits than its factorization.

213158721850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588870 (or 588865 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 43.

The spelling of 213158721850 in words is "two hundred thirteen billion, one hundred fifty-eight million, seven hundred twenty-one thousand, eight hundred fifty".