228633731 has 16 divisors (see below), whose sum is σ = 253269504. Its totient is φ = 205290624.

The previous prime is 228633721. The next prime is 228633749. The reversal of 228633731 is 137336822.

It is a cyclic number.

It is not a de Polignac number, because 228633731 - 2¹⁸ = 228371587 is a prime.

It is a super-2 number, since 2×228633731² = 104546765901960722, 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 = 228633691 and 228633700.

It is not an unprimeable number, because it can be changed into a prime (228633701) 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, 290120 + ... + 290906.

It is an arithmetic number, because the mean of its divisors is an integer number (15829344).

Almost surely, 2^228633731 is an apocalyptic number.

228633731 is a deficient number, since it is larger than the sum of its proper divisors (24635773).

228633731 is a wasteful number, since it uses less digits than its factorization.

228633731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570.

The product of its digits is 36288, while the sum is 35.

The square root of 228633731 is about 15120.6392391327. The cubic root of 228633731 is about 611.4769647680.

The spelling of 228633731 in words is "two hundred twenty-eight million, six hundred thirty-three thousand, seven hundred thirty-one".