103253611561 has 3 divisors (see below), whose sum is σ = 103253932893. Its totient is φ = 103253290230.

The previous prime is 103253611547. The next prime is 103253611633. The reversal of 103253611561 is 165116352301.

The square root of 103253611561 is 321331.

It is a perfect power (a square), and thus also a powerful number.

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.

It is not a de Polignac number, because 103253611561 - 2¹¹ = 103253609513 is a prime.

It is a super-2 number, since 2×103253611561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103253611541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 160666 + ... + 481996.

It is an arithmetic number, because the mean of its divisors is an integer number (34417977631).

Almost surely, 2^103253611561 is an apocalyptic number.

103253611561 is the 321331-st square number.

103253611561 is the 160666-th centered octagonal number.

It is an amenable number.

103253611561 is a deficient number, since it is larger than the sum of its proper divisors (321332).

103253611561 is an frugal number, since it uses more digits than its factorization.

103253611561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642662 (or 321331 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

Adding to 103253611561 its reverse (165116352301), we get a palindrome (268369963862).

The spelling of 103253611561 in words is "one hundred three billion, two hundred fifty-three million, six hundred eleven thousand, five hundred sixty-one".