231969930 has 32 divisors (see below), whose sum is σ = 589477824. Its totient is φ = 58219776.

The previous prime is 231969929. The next prime is 231969937. The reversal of 231969930 is 39969132.

It is a happy number.

231969930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231969937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226912 + ... + 227931.

It is an arithmetic number, because the mean of its divisors is an integer number (18421182).

Almost surely, 2^231969930 is an apocalyptic number.

231969930 is an abundant number, since it is smaller than the sum of its proper divisors (357507894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231969930 is a wasteful number, since it uses less digits than its factorization.

231969930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454870.

The product of its (nonzero) digits is 78732, while the sum is 42.

The square root of 231969930 is about 15230.5590836318. The cubic root of 231969930 is about 614.4368167008.

The spelling of 231969930 in words is "two hundred thirty-one million, nine hundred sixty-nine thousand, nine hundred thirty".