228561479 has 2 divisors, whose sum is σ = 228561480. Its totient is φ = 228561478.

The previous prime is 228561439. The next prime is 228561491. The reversal of 228561479 is 974165822.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228561479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228561409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114280739 + 114280740.

It is an arithmetic number, because the mean of its divisors is an integer number (114280740).

Almost surely, 2^228561479 is an apocalyptic number.

228561479 is a deficient number, since it is larger than the sum of its proper divisors (1).

228561479 is an equidigital number, since it uses as much as digits as its factorization.

228561479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 228561479 is about 15118.2498656425. The cubic root of 228561479 is about 611.4125457396.

The spelling of 228561479 in words is "two hundred twenty-eight million, five hundred sixty-one thousand, four hundred seventy-nine".