1231151224 has 8 divisors (see below), whose sum is σ = 2308408560. Its totient is φ = 615575608.

The previous prime is 1231151191. The next prime is 1231151249. The reversal of 1231151224 is 4221511321.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1231151195 and 1231151204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76946944 + ... + 76946959.

It is an arithmetic number, because the mean of its divisors is an integer number (288551070).

Almost surely, 2^1231151224 is an apocalyptic number.

It is an amenable number.

1231151224 is a deficient number, since it is larger than the sum of its proper divisors (1077257336).

1231151224 is a wasteful number, since it uses less digits than its factorization.

1231151224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153893909 (or 153893905 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 1231151224 is about 35087.7645910936. The cubic root of 1231151224 is about 1071.7754388725.

Adding to 1231151224 its reverse (4221511321), we get a palindrome (5452662545).

The spelling of 1231151224 in words is "one billion, two hundred thirty-one million, one hundred fifty-one thousand, two hundred twenty-four".