61220423 has 8 divisors (see below), whose sum is σ = 67213200. Its totient is φ = 55298880.

The previous prime is 61220407. The next prime is 61220473. The reversal of 61220423 is 32402216.

61220423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61220423 - 2⁴ = 61220407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61220395 and 61220404.

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 7 ways as a sum of consecutive naturals, for example, 15998 + ... + 19451.

It is an arithmetic number, because the mean of its divisors is an integer number (8401650).

Almost surely, 2^61220423 is an apocalyptic number.

61220423 is a deficient number, since it is larger than the sum of its proper divisors (5992777).

61220423 is a wasteful number, since it uses less digits than its factorization.

61220423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35617.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 61220423 is about 7824.3480878601. The cubic root of 61220423 is about 394.1232983517.

Adding to 61220423 its reverse (32402216), we get a palindrome (93622639).

The spelling of 61220423 in words is "sixty-one million, two hundred twenty thousand, four hundred twenty-three".