61421223 has 8 divisors (see below), whose sum is σ = 83440368. Its totient is φ = 40174784.

The previous prime is 61421219. The next prime is 61421237. The reversal of 61421223 is 32212416.

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 61421223 - 2² = 61421219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61421223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61421023) 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, 192990 + ... + 193307.

It is an arithmetic number, because the mean of its divisors is an integer number (10430046).

Almost surely, 2^61421223 is an apocalyptic number.

61421223 is a deficient number, since it is larger than the sum of its proper divisors (22019145).

61421223 is a wasteful number, since it uses less digits than its factorization.

61421223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386353.

The product of its digits is 576, while the sum is 21.

The square root of 61421223 is about 7837.1693231676. The cubic root of 61421223 is about 394.5537298248.

Adding to 61421223 its reverse (32212416), we get a palindrome (93633639).

The spelling of 61421223 in words is "sixty-one million, four hundred twenty-one thousand, two hundred twenty-three".