228463621 has 2 divisors, whose sum is σ = 228463622. Its totient is φ = 228463620.

The previous prime is 228463591. The next prime is 228463661. The reversal of 228463621 is 126364822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228432996 + 30625 = 15114^2 + 175^2 .

It is a cyclic number.

It is not a de Polignac number, because 228463621 - 2⁵ = 228463589 is a prime.

It is a super-2 number, since 2×228463621² = 104391252240863282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228463661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114231810 + 114231811.

It is an arithmetic number, because the mean of its divisors is an integer number (114231811).

Almost surely, 2^228463621 is an apocalyptic number.

It is an amenable number.

228463621 is a deficient number, since it is larger than the sum of its proper divisors (1).

228463621 is an equidigital number, since it uses as much as digits as its factorization.

228463621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 34.

The square root of 228463621 is about 15115.0130995643. The cubic root of 228463621 is about 611.3252750556.

The spelling of 228463621 in words is "two hundred twenty-eight million, four hundred sixty-three thousand, six hundred twenty-one".