1553043113 has 4 divisors (see below), whose sum is σ = 1553157888. Its totient is φ = 1552928340.

The previous prime is 1553043101. The next prime is 1553043127. The reversal of 1553043113 is 3113403551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3113403551 = 233 ⋅13362247.

It is a cyclic number.

It is not a de Polignac number, because 1553043113 - 2⁸ = 1553042857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1553043133) 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, 33881 + ... + 65222.

It is an arithmetic number, because the mean of its divisors is an integer number (388289472).

Almost surely, 2^1553043113 is an apocalyptic number.

It is an amenable number.

1553043113 is a deficient number, since it is larger than the sum of its proper divisors (114775).

1553043113 is an equidigital number, since it uses as much as digits as its factorization.

1553043113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114774.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 1553043113 is about 39408.6679932220. The cubic root of 1553043113 is about 1158.0514037713.

Adding to 1553043113 its reverse (3113403551), we get a palindrome (4666446664).

The spelling of 1553043113 in words is "one billion, five hundred fifty-three million, forty-three thousand, one hundred thirteen".