228378541 has 4 divisors (see below), whose sum is σ = 234550972. Its totient is φ = 222206112.

The previous prime is 228378463. The next prime is 228378559. The reversal of 228378541 is 145873822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145873822 = 2 ⋅72936911.

It can be written as a sum of positive squares in 2 ways, for example, as 215208900 + 13169641 = 14670^2 + 3629^2 .

It is a cyclic number.

It is not a de Polignac number, because 228378541 - 2⁷ = 228378413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228378494 and 228378503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228378341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3086160 + ... + 3086233.

It is an arithmetic number, because the mean of its divisors is an integer number (58637743).

Almost surely, 2^228378541 is an apocalyptic number.

It is an amenable number.

228378541 is a deficient number, since it is larger than the sum of its proper divisors (6172431).

228378541 is an equidigital number, since it uses as much as digits as its factorization.

228378541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6172430.

The product of its digits is 107520, while the sum is 40.

The square root of 228378541 is about 15112.1984171728. The cubic root of 228378541 is about 611.2493796579.

The spelling of 228378541 in words is "two hundred twenty-eight million, three hundred seventy-eight thousand, five hundred forty-one".