228970253 has 4 divisors (see below), whose sum is σ = 229471740. Its totient is φ = 228468768.

The previous prime is 228970241. The next prime is 228970279. The reversal of 228970253 is 352079822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 352079822 = 2 ⋅176039911.

It can be written as a sum of positive squares in 2 ways, for example, as 109767529 + 119202724 = 10477^2 + 10918^2 .

It is a cyclic number.

It is not a de Polignac number, because 228970253 - 2¹⁰ = 228969229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228970223) 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, 250058 + ... + 250971.

It is an arithmetic number, because the mean of its divisors is an integer number (57367935).

Almost surely, 2^228970253 is an apocalyptic number.

It is an amenable number.

228970253 is a deficient number, since it is larger than the sum of its proper divisors (501487).

228970253 is an equidigital number, since it uses as much as digits as its factorization.

228970253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501486.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 228970253 is about 15131.7630499555. The cubic root of 228970253 is about 611.7768251219.

The spelling of 228970253 in words is "two hundred twenty-eight million, nine hundred seventy thousand, two hundred fifty-three".