213198747730 has 8 divisors (see below), whose sum is σ = 383757745932. Its totient is φ = 85279499088.

The previous prime is 213198747721. The next prime is 213198747731. The reversal of 213198747730 is 37747891312.

It can be written as a sum of positive squares in 2 ways, for example, as 199329210369 + 13869537361 = 446463^2 + 117769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (213198747731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10659937377 + ... + 10659937396.

Almost surely, 2^213198747730 is an apocalyptic number.

213198747730 is a deficient number, since it is larger than the sum of its proper divisors (170558998202).

213198747730 is a wasteful number, since it uses less digits than its factorization.

213198747730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21319874780.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 213198747730 in words is "two hundred thirteen billion, one hundred ninety-eight million, seven hundred forty-seven thousand, seven hundred thirty".