61226320 has 20 divisors (see below), whose sum is σ = 142351380. Its totient is φ = 24490496.

The previous prime is 61226317. The next prime is 61226323. The reversal of 61226320 is 2362216.

It is a happy number.

61226320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61226317) and next prime (61226323).

It can be written as a sum of positive squares in 2 ways, for example, as 35093776 + 26132544 = 5924^2 + 5112^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 61226291 and 61226300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61226323) 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 3 ways as a sum of consecutive naturals, for example, 382585 + ... + 382744.

It is an arithmetic number, because the mean of its divisors is an integer number (7117569).

Almost surely, 2^61226320 is an apocalyptic number.

It is an amenable number.

61226320 is an abundant number, since it is smaller than the sum of its proper divisors (81125060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61226320 is a wasteful number, since it uses less digits than its factorization.

61226320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765342 (or 765336 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 61226320 is about 7824.7249152925. The cubic root of 61226320 is about 394.1359524648.

Adding to 61226320 its reverse (2362216), we get a palindrome (63588536).

The spelling of 61226320 in words is "sixty-one million, two hundred twenty-six thousand, three hundred twenty".