23221560 has 32 divisors (see below), whose sum is σ = 69665040. Its totient is φ = 6192384.

The previous prime is 23221537. The next prime is 23221631. The reversal of 23221560 is 6512232.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 96637 + ... + 96876.

Almost surely, 2^23221560 is an apocalyptic number.

23221560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23221560 is an abundant number, since it is smaller than the sum of its proper divisors (46443480).

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

23221560 is a wasteful number, since it uses less digits than its factorization.

23221560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193527 (or 193523 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 23221560 is about 4818.8753874737. The cubic root of 23221560 is about 285.2969511846.

Adding to 23221560 its reverse (6512232), we get a palindrome (29733792).

The spelling of 23221560 in words is "twenty-three million, two hundred twenty-one thousand, five hundred sixty".