231402647 has 12 divisors (see below), whose sum is σ = 275750496. Its totient is φ = 193505760.

The previous prime is 231402641. The next prime is 231402649. The reversal of 231402647 is 746204132.

It is not a de Polignac number, because 231402647 - 2⁶ = 231402583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231402641) 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 in 11 ways as a sum of consecutive naturals, for example, 55583 + ... + 59600.

It is an arithmetic number, because the mean of its divisors is an integer number (22979208).

Almost surely, 2^231402647 is an apocalyptic number.

231402647 is a deficient number, since it is larger than the sum of its proper divisors (44347849).

231402647 is a wasteful number, since it uses less digits than its factorization.

231402647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115238 (or 115231 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 231402647 is about 15211.9245002071. The cubic root of 231402647 is about 613.9355389680.

Adding to 231402647 its reverse (746204132), we get a palindrome (977606779).

The spelling of 231402647 in words is "two hundred thirty-one million, four hundred two thousand, six hundred forty-seven".