226801621 has 2 divisors, whose sum is σ = 226801622. Its totient is φ = 226801620.

The previous prime is 226801529. The next prime is 226801639. The reversal of 226801621 is 126108622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146071396 + 80730225 = 12086^2 + 8985^2 .

It is a cyclic number.

It is not a de Polignac number, because 226801621 - 2⁹ = 226801109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 226801621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226801121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113400810 + 113400811.

It is an arithmetic number, because the mean of its divisors is an integer number (113400811).

Almost surely, 2^226801621 is an apocalyptic number.

It is an amenable number.

226801621 is a deficient number, since it is larger than the sum of its proper divisors (1).

226801621 is an equidigital number, since it uses as much as digits as its factorization.

226801621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 226801621 is about 15059.9342960054. The cubic root of 226801621 is about 609.8392669765.

The spelling of 226801621 in words is "two hundred twenty-six million, eight hundred one thousand, six hundred twenty-one".