231513207 has 8 divisors (see below), whose sum is σ = 313291776. Its totient is φ = 152038392.

The previous prime is 231513199. The next prime is 231513221. The reversal of 231513207 is 702315132.

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

It is not a de Polignac number, because 231513207 - 2³ = 231513199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231513307) 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 7 ways as a sum of consecutive naturals, for example, 575703 + ... + 576104.

It is an arithmetic number, because the mean of its divisors is an integer number (39161472).

Almost surely, 2^231513207 is an apocalyptic number.

231513207 is a deficient number, since it is larger than the sum of its proper divisors (81778569).

231513207 is a wasteful number, since it uses less digits than its factorization.

231513207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151877.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 231513207 is about 15215.5580574621. The cubic root of 231513207 is about 614.0332991663.

Adding to 231513207 its reverse (702315132), we get a palindrome (933828339).

The spelling of 231513207 in words is "two hundred thirty-one million, five hundred thirteen thousand, two hundred seven".