518032381 has 16 divisors (see below), whose sum is σ = 574539264. Its totient is φ = 464580864.

The previous prime is 518032379. The next prime is 518032391. The reversal of 518032381 is 183230815.

It is not a de Polignac number, because 518032381 - 2¹ = 518032379 is a prime.

It is a super-2 number, since 2×518032381² = 536715095529058322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518032391) 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, 105916 + ... + 110698.

It is an arithmetic number, because the mean of its divisors is an integer number (35908704).

Almost surely, 2^518032381 is an apocalyptic number.

It is an amenable number.

518032381 is a deficient number, since it is larger than the sum of its proper divisors (56506883).

518032381 is a wasteful number, since it uses less digits than its factorization.

518032381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 518032381 is about 22760.3247120949. The cubic root of 518032381 is about 803.1296060963.

The spelling of 518032381 in words is "five hundred eighteen million, thirty-two thousand, three hundred eighty-one".