228144431 has 4 divisors (see below), whose sum is σ = 228270864. Its totient is φ = 228018000.

The previous prime is 228144409. The next prime is 228144443. The reversal of 228144431 is 134441822.

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

It is a cyclic number.

It is not a de Polignac number, because 228144431 - 2¹⁰ = 228143407 is a prime.

It is a super-2 number, since 2×228144431² = 104099762792627522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228144394 and 228144403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228144461) 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, 60470 + ... + 64131.

It is an arithmetic number, because the mean of its divisors is an integer number (57067716).

Almost surely, 2^228144431 is an apocalyptic number.

228144431 is a deficient number, since it is larger than the sum of its proper divisors (126433).

228144431 is a wasteful number, since it uses less digits than its factorization.

228144431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126432.

The product of its digits is 6144, while the sum is 29.

The square root of 228144431 is about 15104.4507016972. The cubic root of 228144431 is about 611.0404450875.

The spelling of 228144431 in words is "two hundred twenty-eight million, one hundred forty-four thousand, four hundred thirty-one".