2021223623 has 2 divisors, whose sum is σ = 2021223624. Its totient is φ = 2021223622.

The previous prime is 2021223599. The next prime is 2021223661. The reversal of 2021223623 is 3263221202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021223623 - 2¹² = 2021219527 is a prime.

It is a super-2 number, since 2×2021223623² = 8170689868346492258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021223683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010611811 + 1010611812.

It is an arithmetic number, because the mean of its divisors is an integer number (1010611812).

Almost surely, 2^2021223623 is an apocalyptic number.

2021223623 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021223623 is an equidigital number, since it uses as much as digits as its factorization.

2021223623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 2021223623 is about 44958.0206748473. The cubic root of 2021223623 is about 1264.3620592551.

Adding to 2021223623 its reverse (3263221202), we get a palindrome (5284444825).

The spelling of 2021223623 in words is "two billion, twenty-one million, two hundred twenty-three thousand, six hundred twenty-three".