231620194 has 16 divisors (see below), whose sum is σ = 380499840. Its totient is φ = 105089040.

The previous prime is 231620173. The next prime is 231620197. The reversal of 231620194 is 491026132.

It is not an unprimeable number, because it can be changed into a prime (231620197) 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, 73962 + ... + 77029.

It is an arithmetic number, because the mean of its divisors is an integer number (23781240).

Almost surely, 2^231620194 is an apocalyptic number.

231620194 is a deficient number, since it is larger than the sum of its proper divisors (148879646).

231620194 is a wasteful number, since it uses less digits than its factorization.

231620194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151065.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 231620194 is about 15219.0733620677. The cubic root of 231620194 is about 614.1278703927.

The spelling of 231620194 in words is "two hundred thirty-one million, six hundred twenty thousand, one hundred ninety-four".