228143401 has 4 divisors (see below), whose sum is σ = 230706900. Its totient is φ = 225579904.

The previous prime is 228143387. The next prime is 228143407. The reversal of 228143401 is 104341822.

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 93026025 + 135117376 = 9645^2 + 11624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228143401 is a prime.

It is a super-2 number, since 2×228143401² = 104098822839693602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228143407) 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, 1281616 + ... + 1281793.

It is an arithmetic number, because the mean of its divisors is an integer number (57676725).

Almost surely, 2^228143401 is an apocalyptic number.

It is an amenable number.

228143401 is a deficient number, since it is larger than the sum of its proper divisors (2563499).

228143401 is an equidigital number, since it uses as much as digits as its factorization.

228143401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563498.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 228143401 is about 15104.4166057481. The cubic root of 228143401 is about 611.0395255346.

The spelling of 228143401 in words is "two hundred twenty-eight million, one hundred forty-three thousand, four hundred one".