231401322 has 24 divisors (see below), whose sum is σ = 503922276. Its totient is φ = 76741056.

The previous prime is 231401279. The next prime is 231401333. The reversal of 231401322 is 223104132.

231401322 is a `hidden beast` number, since 231 + 401 + 32 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 228342321 + 3059001 = 15111^2 + 1749^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231401295 and 231401304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29083 + ... + 36174.

Almost surely, 2^231401322 is an apocalyptic number.

231401322 is an abundant number, since it is smaller than the sum of its proper divisors (272520954).

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

231401322 is a wasteful number, since it uses less digits than its factorization.

231401322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65462 (or 65459 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 231401322 is about 15211.8809487847. The cubic root of 231401322 is about 613.9343671777.

Adding to 231401322 its reverse (223104132), we get a palindrome (454505454).

The spelling of 231401322 in words is "two hundred thirty-one million, four hundred one thousand, three hundred twenty-two".