228131022 has 16 divisors (see below), whose sum is σ = 521442432. Its totient is φ = 65180280.

The previous prime is 228131021. The next prime is 228131107. The reversal of 228131022 is 220131822.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 228131022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228131021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2715804 + ... + 2715887.

It is an arithmetic number, because the mean of its divisors is an integer number (32590152).

Almost surely, 2^228131022 is an apocalyptic number.

228131022 is an abundant number, since it is smaller than the sum of its proper divisors (293311410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228131022 is a wasteful number, since it uses less digits than its factorization.

228131022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5431703.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 228131022 is about 15104.0068193841. The cubic root of 228131022 is about 611.0284737209.

Adding to 228131022 its reverse (220131822), we get a palindrome (448262844).

The spelling of 228131022 in words is "two hundred twenty-eight million, one hundred thirty-one thousand, twenty-two".