228312061 has 2 divisors, whose sum is σ = 228312062. Its totient is φ = 228312060.

The previous prime is 228312043. The next prime is 228312107. The reversal of 228312061 is 160213822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212984836 + 15327225 = 14594^2 + 3915^2 .

It is a cyclic number.

It is not a de Polignac number, because 228312061 - 2⁷ = 228311933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228312661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114156030 + 114156031.

It is an arithmetic number, because the mean of its divisors is an integer number (114156031).

Almost surely, 2^228312061 is an apocalyptic number.

It is an amenable number.

228312061 is a deficient number, since it is larger than the sum of its proper divisors (1).

228312061 is an equidigital number, since it uses as much as digits as its factorization.

228312061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 228312061 is about 15109.9987094639. The cubic root of 228312061 is about 611.1900632233.

Adding to 228312061 its reverse (160213822), we get a palindrome (388525883).

The spelling of 228312061 in words is "two hundred twenty-eight million, three hundred twelve thousand, sixty-one".