381515066 has 16 divisors (see below), whose sum is σ = 590806824. Its totient is φ = 184633344.

The previous prime is 381515033. The next prime is 381515083. The reversal of 381515066 is 660515183.

It can be written as a sum of positive squares in 4 ways, for example, as 381381841 + 133225 = 19529^2 + 365^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926 + ... + 27638.

Almost surely, 2^381515066 is an apocalyptic number.

381515066 is a deficient number, since it is larger than the sum of its proper divisors (209291758).

381515066 is a wasteful number, since it uses less digits than its factorization.

381515066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26945.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 381515066 is about 19532.4106551137. The cubic root of 381515066 is about 725.2769871478.

It can be divided in two parts, 3815 and 15066, that added together give a palindrome (18881).

The spelling of 381515066 in words is "three hundred eighty-one million, five hundred fifteen thousand, sixty-six".