381518049 has 16 divisors (see below), whose sum is σ = 561625344. Its totient is φ = 228435600.

The previous prime is 381518047. The next prime is 381518083. The reversal of 381518049 is 940815183.

It is not a de Polignac number, because 381518049 - 2¹ = 381518047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 381517998 and 381518016.

It is not an unprimeable number, because it can be changed into a prime (381518041) 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, 66907 + ... + 72384.

It is an arithmetic number, because the mean of its divisors is an integer number (35101584).

Almost surely, 2^381518049 is an apocalyptic number.

It is an amenable number.

381518049 is a deficient number, since it is larger than the sum of its proper divisors (180107295).

381518049 is a wasteful number, since it uses less digits than its factorization.

381518049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139388.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 381518049 is about 19532.4870152267. The cubic root of 381518049 is about 725.2788774144.

The spelling of 381518049 in words is "three hundred eighty-one million, five hundred eighteen thousand, forty-nine".