228197437 has 4 divisors (see below), whose sum is σ = 245751100. Its totient is φ = 210643776.

The previous prime is 228197419. The next prime is 228197449. The reversal of 228197437 is 734791822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59691076 + 168506361 = 7726^2 + 12981^2 .

It is a cyclic number.

It is not a de Polignac number, because 228197437 - 2²⁷ = 93979709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228197393 and 228197402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228197407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8776812 + ... + 8776837.

It is an arithmetic number, because the mean of its divisors is an integer number (61437775).

Almost surely, 2^228197437 is an apocalyptic number.

It is an amenable number.

228197437 is a deficient number, since it is larger than the sum of its proper divisors (17553663).

228197437 is a wasteful number, since it uses less digits than its factorization.

228197437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17553662.

The product of its digits is 169344, while the sum is 43.

The square root of 228197437 is about 15106.2052481753. The cubic root of 228197437 is about 611.0877635072.

The spelling of 228197437 in words is "two hundred twenty-eight million, one hundred ninety-seven thousand, four hundred thirty-seven".