61226553 has 4 divisors (see below), whose sum is σ = 81635408. Its totient is φ = 40817700.

The previous prime is 61226513. The next prime is 61226579. The reversal of 61226553 is 35562216.

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 not a de Polignac number, because 61226553 - 2¹⁰ = 61225529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61226553.

It is not an unprimeable number, because it can be changed into a prime (61226513) 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, 10204423 + ... + 10204428.

It is an arithmetic number, because the mean of its divisors is an integer number (20408852).

Almost surely, 2^61226553 is an apocalyptic number.

It is an amenable number.

61226553 is a deficient number, since it is larger than the sum of its proper divisors (20408855).

61226553 is a wasteful number, since it uses less digits than its factorization.

61226553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20408854.

The product of its digits is 10800, while the sum is 30.

The square root of 61226553 is about 7824.7398039807. The cubic root of 61226553 is about 394.1364524326.

Adding to 61226553 its reverse (35562216), we get a palindrome (96788769).

The spelling of 61226553 in words is "sixty-one million, two hundred twenty-six thousand, five hundred fifty-three".