231211607 has 8 divisors (see below), whose sum is σ = 252502272. Its totient is φ = 209966200.

The previous prime is 231211601. The next prime is 231211633. The reversal of 231211607 is 706112132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231211607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231211601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143 + ... + 21504.

It is an arithmetic number, because the mean of its divisors is an integer number (31562784).

Almost surely, 2^231211607 is an apocalyptic number.

231211607 is a deficient number, since it is larger than the sum of its proper divisors (21290665).

231211607 is a wasteful number, since it uses less digits than its factorization.

231211607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22629.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 231211607 is about 15205.6439192821. The cubic root of 231211607 is about 613.7665427215.

Adding to 231211607 its reverse (706112132), we get a palindrome (937323739).

The spelling of 231211607 in words is "two hundred thirty-one million, two hundred eleven thousand, six hundred seven".