23221031 has 8 divisors (see below), whose sum is σ = 24648624. Its totient is φ = 21800320.

The previous prime is 23221019. The next prime is 23221063. The reversal of 23221031 is 13012232.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23221031 is a prime.

It is a super-2 number, since 2×23221031² = 1078432561405922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23220997 and 23221015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221091) 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, 6356 + ... + 9318.

It is an arithmetic number, because the mean of its divisors is an integer number (3081078).

Almost surely, 2^23221031 is an apocalyptic number.

23221031 is a deficient number, since it is larger than the sum of its proper divisors (1427593).

23221031 is a wasteful number, since it uses less digits than its factorization.

23221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 23221031 is about 4818.8204988358. The cubic root of 23221031 is about 285.2947847606.

Adding to 23221031 its reverse (13012232), we get a palindrome (36233263).

The spelling of 23221031 in words is "twenty-three million, two hundred twenty-one thousand, thirty-one".