231641404 has 6 divisors (see below), whose sum is σ = 405372464. Its totient is φ = 115820700.

The previous prime is 231641401. The next prime is 231641471. The reversal of 231641404 is 404146132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231641401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28955172 + ... + 28955179.

Almost surely, 2^231641404 is an apocalyptic number.

It is an amenable number.

231641404 is a deficient number, since it is larger than the sum of its proper divisors (173731060).

231641404 is a wasteful number, since it uses less digits than its factorization.

231641404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57910355 (or 57910353 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 231641404 is about 15219.7701690926. The cubic root of 231641404 is about 614.1466155264.

Adding to 231641404 its reverse (404146132), we get a palindrome (635787536).

The spelling of 231641404 in words is "two hundred thirty-one million, six hundred forty-one thousand, four hundred four".