231211245 has 8 divisors (see below), whose sum is σ = 369938016. Its totient is φ = 123312656.

The previous prime is 231211219. The next prime is 231211291. The reversal of 231211245 is 542112132.

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

It is a cyclic number.

It is not a de Polignac number, because 231211245 - 2¹⁴ = 231194861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7707027 + ... + 7707056.

It is an arithmetic number, because the mean of its divisors is an integer number (46242252).

Almost surely, 2^231211245 is an apocalyptic number.

It is an amenable number.

231211245 is a deficient number, since it is larger than the sum of its proper divisors (138726771).

231211245 is a wasteful number, since it uses less digits than its factorization.

231211245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15414091.

The product of its digits is 480, while the sum is 21.

The square root of 231211245 is about 15205.6320158026. The cubic root of 231211245 is about 613.7662224036.

Adding to 231211245 its reverse (542112132), we get a palindrome (773323377).

The spelling of 231211245 in words is "two hundred thirty-one million, two hundred eleven thousand, two hundred forty-five".