61220453 has 6 divisors (see below), whose sum is σ = 71215686. Its totient is φ = 52474632.

The previous prime is 61220407. The next prime is 61220473. The reversal of 61220453 is 35402216.

61220453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 53919649 + 7300804 = 7343^2 + 2702^2 .

It is not a de Polignac number, because 61220453 - 2¹⁰ = 61219429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61220473) 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 5 ways as a sum of consecutive naturals, for example, 624650 + ... + 624747.

It is an arithmetic number, because the mean of its divisors is an integer number (11869281).

Almost surely, 2^61220453 is an apocalyptic number.

It is an amenable number.

61220453 is a deficient number, since it is larger than the sum of its proper divisors (9995233).

61220453 is a wasteful number, since it uses less digits than its factorization.

61220453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249411 (or 1249404 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 61220453 is about 7824.3500049525. The cubic root of 61220453 is about 394.1233627295.

Adding to 61220453 its reverse (35402216), we get a palindrome (96622669).

The spelling of 61220453 in words is "sixty-one million, two hundred twenty thousand, four hundred fifty-three".