231401432 has 8 divisors (see below), whose sum is σ = 433877700. Its totient is φ = 115700712.

The previous prime is 231401431. The next prime is 231401449. The reversal of 231401432 is 234104132.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231401431) by changing a digit.

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 as a sum of consecutive naturals, namely, 14462582 + ... + 14462597.

Almost surely, 2^231401432 is an apocalyptic number.

It is an amenable number.

231401432 is a deficient number, since it is larger than the sum of its proper divisors (202476268).

231401432 is a wasteful number, since it uses less digits than its factorization.

231401432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28925185 (or 28925181 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 231401432 is about 15211.8845643793. The cubic root of 231401432 is about 613.9344644586.

Adding to 231401432 its reverse (234104132), we get a palindrome (465505564).

The spelling of 231401432 in words is "two hundred thirty-one million, four hundred one thousand, four hundred thirty-two".