231491430 has 24 divisors (see below), whose sum is σ = 601877952. Its totient is φ = 61731024.

The previous prime is 231491423. The next prime is 231491437. The reversal of 231491430 is 34194132.

It is an interprime number because it is at equal distance from previous prime (231491423) and next prime (231491437).

It is a junction number, because it is equal to n+sod(n) for n = 231491394 and 231491403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231491437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1285974 + ... + 1286153.

It is an arithmetic number, because the mean of its divisors is an integer number (25078248).

Almost surely, 2^231491430 is an apocalyptic number.

231491430 is an abundant number, since it is smaller than the sum of its proper divisors (370386522).

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

231491430 is a wasteful number, since it uses less digits than its factorization.

231491430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572140 (or 2572137 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 231491430 is about 15214.8424244223. The cubic root of 231491430 is about 614.0140458047.

The spelling of 231491430 in words is "two hundred thirty-one million, four hundred ninety-one thousand, four hundred thirty".