228364731 has 16 divisors (see below), whose sum is σ = 386649600. Its totient is φ = 130494024.

The previous prime is 228364729. The next prime is 228364733. The reversal of 228364731 is 137463822.

It is a happy number.

228364731 is a `hidden beast` number, since 2 + 2 + 8 + 3 + 647 + 3 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (228364729) and next prime (228364733).

It is not a de Polignac number, because 228364731 - 2¹ = 228364729 is a prime.

It is a super-2 number, since 2×228364731² = 104300900729404722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228364733) 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, 603951 + ... + 604328.

It is an arithmetic number, because the mean of its divisors is an integer number (24165600).

Almost surely, 2^228364731 is an apocalyptic number.

228364731 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

228364731 is a deficient number, since it is larger than the sum of its proper divisors (158284869).

228364731 is a wasteful number, since it uses less digits than its factorization.

228364731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208295 (or 1208289 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 228364731 is about 15111.7414946127. The cubic root of 228364731 is about 611.2370587045.

Subtracting from 228364731 its reverse (137463822), we obtain a palindrome (90900909).

The spelling of 228364731 in words is "two hundred twenty-eight million, three hundred sixty-four thousand, seven hundred thirty-one".