228501651 has 48 divisors (see below), whose sum is σ = 375072768. Its totient is φ = 123177600.

The previous prime is 228501649. The next prime is 228501659. The reversal of 228501651 is 156105822.

It is not a de Polignac number, because 228501651 - 2¹ = 228501649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228501659) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 186226 + ... + 187448.

It is an arithmetic number, because the mean of its divisors is an integer number (7814016).

Almost surely, 2^228501651 is an apocalyptic number.

228501651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

228501651 is a deficient number, since it is larger than the sum of its proper divisors (146571117).

228501651 is a wasteful number, since it uses less digits than its factorization.

228501651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312 (or 1305 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 228501651 is about 15116.2710679585. The cubic root of 228501651 is about 611.3591935269.

The spelling of 228501651 in words is "two hundred twenty-eight million, five hundred one thousand, six hundred fifty-one".