381011516 has 24 divisors (see below), whose sum is σ = 684780096. Its totient is φ = 185405760.

The previous prime is 381011473. The next prime is 381011573. The reversal of 381011516 is 615110183.

It is a congruent 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, 28430 + ... + 39626.

It is an arithmetic number, because the mean of its divisors is an integer number (28532504).

Almost surely, 2^381011516 is an apocalyptic number.

It is an amenable number.

381011516 is a deficient number, since it is larger than the sum of its proper divisors (303768580).

381011516 is a wasteful number, since it uses less digits than its factorization.

381011516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11429 (or 11427 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 381011516 is about 19519.5162849903. The cubic root of 381011516 is about 724.9577563971.

Adding to 381011516 its reverse (615110183), we get a palindrome (996121699).

The spelling of 381011516 in words is "three hundred eighty-one million, eleven thousand, five hundred sixteen".