228686031 has 16 divisors (see below), whose sum is σ = 387193600. Its totient is φ = 130677624.

The previous prime is 228686021. The next prime is 228686047. The reversal of 228686031 is 130686822.

It is not a de Polignac number, because 228686031 - 2⁹ = 228685519 is a prime.

It is a super-2 number, since 2×228686031² = 104594601549065922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228686021) 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, 604801 + ... + 605178.

It is an arithmetic number, because the mean of its divisors is an integer number (24199600).

Almost surely, 2^228686031 is an apocalyptic number.

228686031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

228686031 is a deficient number, since it is larger than the sum of its proper divisors (158507569).

228686031 is a wasteful number, since it uses less digits than its factorization.

228686031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209995 (or 1209989 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 228686031 is about 15122.3685644809. The cubic root of 228686031 is about 611.5235863622.

The spelling of 228686031 in words is "two hundred twenty-eight million, six hundred eighty-six thousand, thirty-one".