61220443 has 8 divisors (see below), whose sum is σ = 63824256. Its totient is φ = 58656000.

The previous prime is 61220407. The next prime is 61220473. The reversal of 61220443 is 34402216.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61220443 - 2⁹ = 61219931 is a prime.

It is a super-2 number, since 2×61220443² = 7495885282232498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61220473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6646 + ... + 12907.

It is an arithmetic number, because the mean of its divisors is an integer number (7978032).

Almost surely, 2^61220443 is an apocalyptic number.

61220443 is a deficient number, since it is larger than the sum of its proper divisors (2603813).

61220443 is a wasteful number, since it uses less digits than its factorization.

61220443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19685.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 61220443 is about 7824.3493659217. The cubic root of 61220443 is about 394.1233412702.

Adding to 61220443 its reverse (34402216), we get a palindrome (95622659).

The spelling of 61220443 in words is "sixty-one million, two hundred twenty thousand, four hundred forty-three".