228526231 has 2 divisors, whose sum is σ = 228526232. Its totient is φ = 228526230.

The previous prime is 228526187. The next prime is 228526237. The reversal of 228526231 is 132625822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228526231 - 2⁹ = 228525719 is a prime.

It is a super-2 number, since 2×228526231² = 104448476510130722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 228526193 and 228526202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228526237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114263115 + 114263116.

It is an arithmetic number, because the mean of its divisors is an integer number (114263116).

Almost surely, 2^228526231 is an apocalyptic number.

228526231 is a deficient number, since it is larger than the sum of its proper divisors (1).

228526231 is an equidigital number, since it uses as much as digits as its factorization.

228526231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 228526231 is about 15117.0840772948. The cubic root of 228526231 is about 611.3811141128.

The spelling of 228526231 in words is "two hundred twenty-eight million, five hundred twenty-six thousand, two hundred thirty-one".