1231224533 has 8 divisors (see below), whose sum is σ = 1535033280. Its totient is φ = 959395680.

The previous prime is 1231224521. The next prime is 1231224539. The reversal of 1231224533 is 3354221321.

It is a happy number.

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 1231224533 - 2¹⁸ = 1230962389 is a prime.

It is a super-2 number, since 2×1231224533² = 3031827701322136178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231224539) 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, 7994888 + ... + 7995041.

It is an arithmetic number, because the mean of its divisors is an integer number (191879160).

Almost surely, 2^1231224533 is an apocalyptic number.

It is an amenable number.

1231224533 is a deficient number, since it is larger than the sum of its proper divisors (303808747).

1231224533 is a wasteful number, since it uses less digits than its factorization.

1231224533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15989947.

The product of its digits is 4320, while the sum is 26.

The square root of 1231224533 is about 35088.8092274446. The cubic root of 1231224533 is about 1071.7967114356.

Adding to 1231224533 its reverse (3354221321), we get a palindrome (4585445854).

The spelling of 1231224533 in words is "one billion, two hundred thirty-one million, two hundred twenty-four thousand, five hundred thirty-three".