228146653 has 4 divisors (see below), whose sum is σ = 260739040. Its totient is φ = 195554268.

The previous prime is 228146629. The next prime is 228146657. The reversal of 228146653 is 356641822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 356641822 = 2 ⋅178320911.

It is not a de Polignac number, because 228146653 - 2²⁵ = 194592221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228146657) 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, 16296183 + ... + 16296196.

It is an arithmetic number, because the mean of its divisors is an integer number (65184760).

Almost surely, 2^228146653 is an apocalyptic number.

It is an amenable number.

228146653 is a deficient number, since it is larger than the sum of its proper divisors (32592387).

228146653 is an equidigital number, since it uses as much as digits as its factorization.

228146653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32592386.

The product of its digits is 69120, while the sum is 37.

The square root of 228146653 is about 15104.5242559969. The cubic root of 228146653 is about 611.0424288125.

The spelling of 228146653 in words is "two hundred twenty-eight million, one hundred forty-six thousand, six hundred fifty-three".