213561308 has 6 divisors (see below), whose sum is σ = 373732296. Its totient is φ = 106780652.

The previous prime is 213561289. The next prime is 213561343. The reversal of 213561308 is 803165312.

213561308 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

213561308 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26695160 + ... + 26695167.

It is an arithmetic number, because the mean of its divisors is an integer number (62288716).

Almost surely, 2^213561308 is an apocalyptic number.

It is an amenable number.

213561308 is a deficient number, since it is larger than the sum of its proper divisors (160170988).

213561308 is a wasteful number, since it uses less digits than its factorization.

213561308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53390331 (or 53390329 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 213561308 is about 14613.7369621873. The cubic root of 213561308 is about 597.7334001760.

The spelling of 213561308 in words is "two hundred thirteen million, five hundred sixty-one thousand, three hundred eight".