228121743 has 16 divisors (see below), whose sum is σ = 318643200. Its totient is φ = 144973920.

The previous prime is 228121741. The next prime is 228121757. The reversal of 228121743 is 347121822.

It is not a de Polignac number, because 228121743 - 2¹ = 228121741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228121743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228121741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9723 + ... + 23468.

It is an arithmetic number, because the mean of its divisors is an integer number (19915200).

Almost surely, 2^228121743 is an apocalyptic number.

228121743 is a deficient number, since it is larger than the sum of its proper divisors (90521457).

228121743 is a wasteful number, since it uses less digits than its factorization.

228121743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33302.

The product of its digits is 5376, while the sum is 30.

The square root of 228121743 is about 15103.6996461132. The cubic root of 228121743 is about 611.0201892856.

The spelling of 228121743 in words is "two hundred twenty-eight million, one hundred twenty-one thousand, seven hundred forty-three".