228261613 has 2 divisors, whose sum is σ = 228261614. Its totient is φ = 228261612.

The previous prime is 228261589. The next prime is 228261623. The reversal of 228261613 is 316162822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223412809 + 4848804 = 14947^2 + 2202^2 .

It is a cyclic number.

It is not a de Polignac number, because 228261613 - 2⁹ = 228261101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228261623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114130806 + 114130807.

It is an arithmetic number, because the mean of its divisors is an integer number (114130807).

Almost surely, 2^228261613 is an apocalyptic number.

It is an amenable number.

228261613 is a deficient number, since it is larger than the sum of its proper divisors (1).

228261613 is an equidigital number, since it uses as much as digits as its factorization.

228261613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 228261613 is about 15108.3292590544. The cubic root of 228261613 is about 611.1450435728.

The spelling of 228261613 in words is "two hundred twenty-eight million, two hundred sixty-one thousand, six hundred thirteen".