228785537 has 2 divisors, whose sum is σ = 228785538. Its totient is φ = 228785536.

The previous prime is 228785497. The next prime is 228785561. The reversal of 228785537 is 735587822.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183033841 + 45751696 = 13529^2 + 6764^2 .

It is a cyclic number.

It is not a de Polignac number, because 228785537 - 2²⁶ = 161676673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 228785491 and 228785500.

It is not a weakly prime, because it can be changed into another prime (228785567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114392768 + 114392769.

It is an arithmetic number, because the mean of its divisors is an integer number (114392769).

Almost surely, 2^228785537 is an apocalyptic number.

It is an amenable number.

228785537 is a deficient number, since it is larger than the sum of its proper divisors (1).

228785537 is an equidigital number, since it uses as much as digits as its factorization.

228785537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 940800, while the sum is 47.

The square root of 228785537 is about 15125.6582336109. The cubic root of 228785537 is about 611.6122690014.

The spelling of 228785537 in words is "two hundred twenty-eight million, seven hundred eighty-five thousand, five hundred thirty-seven".