23221977 has 16 divisors (see below), whose sum is σ = 32062272. Its totient is φ = 14938560.

The previous prime is 23221951. The next prime is 23221981. The reversal of 23221977 is 77912232.

It is not a de Polignac number, because 23221977 - 2¹¹ = 23219929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23221997) 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 15 ways as a sum of consecutive naturals, for example, 13743 + ... + 15339.

It is an arithmetic number, because the mean of its divisors is an integer number (2003892).

Almost surely, 2^23221977 is an apocalyptic number.

It is an amenable number.

23221977 is a deficient number, since it is larger than the sum of its proper divisors (8840295).

23221977 is a wasteful number, since it uses less digits than its factorization.

23221977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768.

The product of its digits is 10584, while the sum is 33.

The square root of 23221977 is about 4818.9186546361. The cubic root of 23221977 is about 285.2986589096.

The spelling of 23221977 in words is "twenty-three million, two hundred twenty-one thousand, nine hundred seventy-seven".