228931487 has 2 divisors, whose sum is σ = 228931488. Its totient is φ = 228931486.

The previous prime is 228931463. The next prime is 228931511. The reversal of 228931487 is 784139822.

It is a balanced prime because it is at equal distance from previous prime (228931463) and next prime (228931511).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228931487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228931427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114465743 + 114465744.

It is an arithmetic number, because the mean of its divisors is an integer number (114465744).

Almost surely, 2^228931487 is an apocalyptic number.

228931487 is a deficient number, since it is larger than the sum of its proper divisors (1).

228931487 is an equidigital number, since it uses as much as digits as its factorization.

228931487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 228931487 is about 15130.4820478397. The cubic root of 228931487 is about 611.7422973778.

The spelling of 228931487 in words is "two hundred twenty-eight million, nine hundred thirty-one thousand, four hundred eighty-seven".