228146537 has 2 divisors, whose sum is σ = 228146538. Its totient is φ = 228146536.

The previous prime is 228146531. The next prime is 228146539. The reversal of 228146537 is 735641822.

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., 119486761 + 108659776 = 10931^2 + 10424^2 .

It is a cyclic number.

It is not a de Polignac number, because 228146537 - 2⁶ = 228146473 is a prime.

Together with 228146539, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228146537.

It is not a weakly prime, because it can be changed into another prime (228146531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114073268 + 114073269.

It is an arithmetic number, because the mean of its divisors is an integer number (114073269).

Almost surely, 2^228146537 is an apocalyptic number.

It is an amenable number.

228146537 is a deficient number, since it is larger than the sum of its proper divisors (1).

228146537 is an equidigital number, since it uses as much as digits as its factorization.

228146537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 38.

The square root of 228146537 is about 15104.5204160874. The cubic root of 228146537 is about 611.0423252520.

The spelling of 228146537 in words is "two hundred twenty-eight million, one hundred forty-six thousand, five hundred thirty-seven".