23220147 has 32 divisors (see below), whose sum is σ = 35665920. Its totient is φ = 13340160.

The previous prime is 23220139. The next prime is 23220149. The reversal of 23220147 is 74102232.

It is not a de Polignac number, because 23220147 - 2³ = 23220139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23220149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29653 + ... + 30425.

It is an arithmetic number, because the mean of its divisors is an integer number (1114560).

Almost surely, 2^23220147 is an apocalyptic number.

23220147 is a deficient number, since it is larger than the sum of its proper divisors (12445773).

23220147 is a wasteful number, since it uses less digits than its factorization.

23220147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 23220147 is about 4818.7287742723. The cubic root of 23220147 is about 285.2911644248.

Adding to 23220147 its reverse (74102232), we get a palindrome (97322379).

The spelling of 23220147 in words is "twenty-three million, two hundred twenty thousand, one hundred forty-seven".