1233520430553 has 24 divisors (see below), whose sum is σ = 1796416002056. Its totient is φ = 815598201600.

The previous prime is 1233520430551. The next prime is 1233520430609. The reversal of 1233520430553 is 3550340253321.

1233520430553 is a `hidden beast` number, since 1 + 23 + 3 + 52 + 0 + 4 + 30 + 553 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 109502751744 + 1124017678809 = 330912^2 + 1060197^2 .

It is not a de Polignac number, because 1233520430553 - 2¹ = 1233520430551 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1233520430551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42388 + ... + 1571253.

Almost surely, 2^{1233520430553} is an apocalyptic number.

It is an amenable number.

1233520430553 is a deficient number, since it is larger than the sum of its proper divisors (562895571503).

1233520430553 is a wasteful number, since it uses less digits than its factorization.

1233520430553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614345 (or 1614342 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 36.

Adding to 1233520430553 its reverse (3550340253321), we get a palindrome (4783860683874).

The spelling of 1233520430553 in words is "one trillion, two hundred thirty-three billion, five hundred twenty million, four hundred thirty thousand, five hundred fifty-three".