22711621 has 2 divisors, whose sum is σ = 22711622. Its totient is φ = 22711620.

The previous prime is 22711607. The next prime is 22711639. The reversal of 22711621 is 12611722.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13771521 + 8940100 = 3711^2 + 2990^2 .

It is a cyclic number.

It is not a de Polignac number, because 22711621 - 2⁵ = 22711589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22711592 and 22711601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22711651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11355810 + 11355811.

It is an arithmetic number, because the mean of its divisors is an integer number (11355811).

Almost surely, 2^22711621 is an apocalyptic number.

It is an amenable number.

22711621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22711621 is an equidigital number, since it uses as much as digits as its factorization.

22711621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 22.

The square root of 22711621 is about 4765.6710964984. The cubic root of 22711621 is about 283.1931281715.

It can be divided in two parts, 22711 and 621, that added together give a palindrome (23332).

The spelling of 22711621 in words is "twenty-two million, seven hundred eleven thousand, six hundred twenty-one".