1224170231 has 4 divisors (see below), whose sum is σ = 1228081632. Its totient is φ = 1220258832.

The previous prime is 1224170219. The next prime is 1224170257. The reversal of 1224170231 is 1320714221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224170231 is a prime.

It is a super-2 number, since 2×1224170231² = 2997185508933186722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1224170197 and 1224170206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224170531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1955231 + ... + 1955856.

It is an arithmetic number, because the mean of its divisors is an integer number (307020408).

Almost surely, 2^1224170231 is an apocalyptic number.

1224170231 is a deficient number, since it is larger than the sum of its proper divisors (3911401).

1224170231 is an equidigital number, since it uses as much as digits as its factorization.

1224170231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911400.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1224170231 is about 34988.1441491257. The cubic root of 1224170231 is about 1069.7458362165.

Adding to 1224170231 its reverse (1320714221), we get a palindrome (2544884452).

The spelling of 1224170231 in words is "one billion, two hundred twenty-four million, one hundred seventy thousand, two hundred thirty-one".