228191253 has 4 divisors (see below), whose sum is σ = 304255008. Its totient is φ = 152127500.

The previous prime is 228191237. The next prime is 228191267. The reversal of 228191253 is 352191822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228191253 - 2⁴ = 228191237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228191753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38031873 + ... + 38031878.

It is an arithmetic number, because the mean of its divisors is an integer number (76063752).

Almost surely, 2^228191253 is an apocalyptic number.

It is an amenable number.

228191253 is a deficient number, since it is larger than the sum of its proper divisors (76063755).

228191253 is an equidigital number, since it uses as much as digits as its factorization.

228191253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76063754.

The product of its digits is 8640, while the sum is 33.

The square root of 228191253 is about 15106.0005626903. Note that the first 3 decimals coincide. The cubic root of 228191253 is about 611.0822434322.

The spelling of 228191253 in words is "two hundred twenty-eight million, one hundred ninety-one thousand, two hundred fifty-three".