231402404224 has 16 divisors (see below), whose sum is σ = 460996977420. Its totient is φ = 115701202048.

The previous prime is 231402404143. The next prime is 231402404237. The reversal of 231402404224 is 422404204132.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 231402404192 and 231402404201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 903915514 + ... + 903915769.

Almost surely, 2^231402404224 is an apocalyptic number.

It is an amenable number.

231402404224 is a deficient number, since it is larger than the sum of its proper divisors (229594573196).

231402404224 is an equidigital number, since it uses as much as digits as its factorization.

231402404224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807831297 (or 1807831285 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 231402404224 its reverse (422404204132), we get a palindrome (653806608356).

It can be divided in two parts, 23140 and 2404224, that added together give a square (2427364 = 1558²).

The spelling of 231402404224 in words is "two hundred thirty-one billion, four hundred two million, four hundred four thousand, two hundred twenty-four".