231213007 has 2 divisors, whose sum is σ = 231213008. Its totient is φ = 231213006.

The previous prime is 231212987. The next prime is 231213019. The reversal of 231213007 is 700312132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231213007 - 2²⁷ = 96995279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231213077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115606503 + 115606504.

It is an arithmetic number, because the mean of its divisors is an integer number (115606504).

Almost surely, 2^231213007 is an apocalyptic number.

231213007 is a deficient number, since it is larger than the sum of its proper divisors (1).

231213007 is an equidigital number, since it uses as much as digits as its factorization.

231213007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 231213007 is about 15205.6899547505. The cubic root of 231213007 is about 613.7677815166.

Adding to 231213007 its reverse (700312132), we get a palindrome (931525139).

The spelling of 231213007 in words is "two hundred thirty-one million, two hundred thirteen thousand, seven".