228146531 has 2 divisors, whose sum is σ = 228146532. Its totient is φ = 228146530.

The previous prime is 228146489. The next prime is 228146537. The reversal of 228146531 is 135641822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228146531 - 2⁶ = 228146467 is a prime.

It is a super-2 number, since 2×228146531² = 104101679214667922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228146537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114073265 + 114073266.

It is an arithmetic number, because the mean of its divisors is an integer number (114073266).

Almost surely, 2^228146531 is an apocalyptic number.

228146531 is a deficient number, since it is larger than the sum of its proper divisors (1).

228146531 is an equidigital number, since it uses as much as digits as its factorization.

228146531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 228146531 is about 15104.5202174713. The cubic root of 228146531 is about 611.0423198955.

The spelling of 228146531 in words is "two hundred twenty-eight million, one hundred forty-six thousand, five hundred thirty-one".