61453221 has 4 divisors (see below), whose sum is σ = 81937632. Its totient is φ = 40968812.

The previous prime is 61453211. The next prime is 61453229. The reversal of 61453221 is 12235416.

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 not a de Polignac number, because 61453221 - 2⁹ = 61452709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61453191 and 61453200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61453229) 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, 10242201 + ... + 10242206.

It is an arithmetic number, because the mean of its divisors is an integer number (20484408).

Almost surely, 2^61453221 is an apocalyptic number.

It is an amenable number.

61453221 is a deficient number, since it is larger than the sum of its proper divisors (20484411).

61453221 is a wasteful number, since it uses less digits than its factorization.

61453221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20484410.

The product of its digits is 1440, while the sum is 24.

The square root of 61453221 is about 7839.2104832056. The cubic root of 61453221 is about 394.6222334999.

Adding to 61453221 its reverse (12235416), we get a palindrome (73688637).

It can be divided in two parts, 614 and 53221, that added together give a palindrome (53835).

The spelling of 61453221 in words is "sixty-one million, four hundred fifty-three thousand, two hundred twenty-one".