228538637 has 2 divisors, whose sum is σ = 228538638. Its totient is φ = 228538636.

The previous prime is 228538621. The next prime is 228538643. The reversal of 228538637 is 736835822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228040201 + 498436 = 15101^2 + 706^2 .

It is a cyclic number.

It is not a de Polignac number, because 228538637 - 2⁴ = 228538621 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228538697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114269318 + 114269319.

It is an arithmetic number, because the mean of its divisors is an integer number (114269319).

Almost surely, 2^228538637 is an apocalyptic number.

It is an amenable number.

228538637 is a deficient number, since it is larger than the sum of its proper divisors (1).

228538637 is an equidigital number, since it uses as much as digits as its factorization.

228538637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 44.

The square root of 228538637 is about 15117.4944021819. The cubic root of 228538637 is about 611.3921772583.

The spelling of 228538637 in words is "two hundred twenty-eight million, five hundred thirty-eight thousand, six hundred thirty-seven".