231121245 has 8 divisors (see below), whose sum is σ = 369794016. Its totient is φ = 123264656.

The previous prime is 231121237. The next prime is 231121249. The reversal of 231121245 is 542121132.

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 231121245 - 2³ = 231121237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231121249) 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, 7704027 + ... + 7704056.

It is an arithmetic number, because the mean of its divisors is an integer number (46224252).

Almost surely, 2^231121245 is an apocalyptic number.

It is an amenable number.

231121245 is a deficient number, since it is larger than the sum of its proper divisors (138672771).

231121245 is a wasteful number, since it uses less digits than its factorization.

231121245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15408091.

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

The square root of 231121245 is about 15202.6722979876. The cubic root of 231121245 is about 613.6865749959.

Adding to 231121245 its reverse (542121132), we get a palindrome (773242377).

The spelling of 231121245 in words is "two hundred thirty-one million, one hundred twenty-one thousand, two hundred forty-five".