23221554 has 8 divisors (see below), whose sum is σ = 46443120. Its totient is φ = 7740516.

The previous prime is 23221537. The next prime is 23221631. The reversal of 23221554 is 45512232.

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

23221554 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1935124 + ... + 1935135.

It is an arithmetic number, because the mean of its divisors is an integer number (5805390).

Almost surely, 2^23221554 is an apocalyptic number.

23221554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23221554 is a wasteful number, since it uses less digits than its factorization.

23221554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870264.

The product of its digits is 2400, while the sum is 24.

The square root of 23221554 is about 4818.8747649218. The cubic root of 23221554 is about 285.2969266129.

Adding to 23221554 its reverse (45512232), we get a palindrome (68733786).

The spelling of 23221554 in words is "twenty-three million, two hundred twenty-one thousand, five hundred fifty-four".