1253055553 has 4 divisors (see below), whose sum is σ = 1253136580. Its totient is φ = 1252974528.

The previous prime is 1253055547. The next prime is 1253055563. The reversal of 1253055553 is 3555503521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3555503521 = 11953 ⋅297457.

It can be written as a sum of positive squares in 2 ways, for example, as 93857344 + 1159198209 = 9688^2 + 34047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253055553 - 2²⁵ = 1219501121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253055523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9300 + ... + 50917.

It is an arithmetic number, because the mean of its divisors is an integer number (313284145).

Almost surely, 2^1253055553 is an apocalyptic number.

It is an amenable number.

1253055553 is a deficient number, since it is larger than the sum of its proper divisors (81027).

1253055553 is an equidigital number, since it uses as much as digits as its factorization.

1253055553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81026.

The product of its (nonzero) digits is 56250, while the sum is 34.

The square root of 1253055553 is about 35398.5247291466. The cubic root of 1253055553 is about 1078.0943627146.

It can be divided in two parts, 12 and 53055553, that multiplied together give a palindrome (636666636).

The spelling of 1253055553 in words is "one billion, two hundred fifty-three million, fifty-five thousand, five hundred fifty-three".