231647064 has 64 divisors (see below), whose sum is σ = 638928000. Its totient is φ = 69400320.

The previous prime is 231647057. The next prime is 231647071. The reversal of 231647064 is 460746132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (231647057) and next prime (231647071).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18567 + ... + 28425.

It is an arithmetic number, because the mean of its divisors is an integer number (9983250).

Almost surely, 2^231647064 is an apocalyptic number.

231647064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231647064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319464000).

231647064 is an abundant number, since it is smaller than the sum of its proper divisors (407280936).

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

231647064 is a wasteful number, since it uses less digits than its factorization.

231647064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9968 (or 9964 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 231647064 is about 15219.9561103178. The cubic root of 231647064 is about 614.1516175705.

The spelling of 231647064 in words is "two hundred thirty-one million, six hundred forty-seven thousand, sixty-four".