388227481 has 2 divisors, whose sum is σ = 388227482. Its totient is φ = 388227480.

The previous prime is 388227461. The next prime is 388227517. The reversal of 388227481 is 184722883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305690256 + 82537225 = 17484^2 + 9085^2 .

It is a cyclic number.

It is not a de Polignac number, because 388227481 - 2¹³ = 388219289 is a prime.

It is a super-2 number, since 2×388227481² = 301441154007210722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (388227461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194113740 + 194113741.

It is an arithmetic number, because the mean of its divisors is an integer number (194113741).

Almost surely, 2^388227481 is an apocalyptic number.

It is an amenable number.

388227481 is a deficient number, since it is larger than the sum of its proper divisors (1).

388227481 is an equidigital number, since it uses as much as digits as its factorization.

388227481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172032, while the sum is 43.

The square root of 388227481 is about 19703.4890565098. The cubic root of 388227481 is about 729.5058149004.

The spelling of 388227481 in words is "three hundred eighty-eight million, two hundred twenty-seven thousand, four hundred eighty-one".