199631612 has 24 divisors (see below), whose sum is σ = 373376304. Its totient is φ = 93062912.

The previous prime is 199631609. The next prime is 199631617. The reversal of 199631612 is 216136991.

199631612 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199631617) 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, 6443 + ... + 20994.

It is an arithmetic number, because the mean of its divisors is an integer number (15557346).

Almost surely, 2^199631612 is an apocalyptic number.

It is an amenable number.

199631612 is a deficient number, since it is larger than the sum of its proper divisors (173744692).

199631612 is a wasteful number, since it uses less digits than its factorization.

199631612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27565 (or 27563 counting only the distinct ones).

The product of its digits is 17496, while the sum is 38.

The square root of 199631612 is about 14129.1051379767. The cubic root of 199631612 is about 584.4442692803. Note that the first 3 decimals are identical.

The spelling of 199631612 in words is "one hundred ninety-nine million, six hundred thirty-one thousand, six hundred twelve".