1023144553 has 4 divisors (see below), whose sum is σ = 1056149248. Its totient is φ = 990139860.

The previous prime is 1023144539. The next prime is 1023144557. The reversal of 1023144553 is 3554413201.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023144553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023144557) 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, 16502301 + ... + 16502362.

It is an arithmetic number, because the mean of its divisors is an integer number (264037312).

Almost surely, 2^1023144553 is an apocalyptic number.

It is an amenable number.

1023144553 is a deficient number, since it is larger than the sum of its proper divisors (33004695).

1023144553 is an equidigital number, since it uses as much as digits as its factorization.

1023144553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33004694.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1023144553 is about 31986.6308479027. The cubic root of 1023144553 is about 1007.6560857620.

Adding to 1023144553 its reverse (3554413201), we get a palindrome (4577557754).

The spelling of 1023144553 in words is "one billion, twenty-three million, one hundred forty-four thousand, five hundred fifty-three".