381518051 has 4 divisors (see below), whose sum is σ = 381756192. Its totient is φ = 381279912.

The previous prime is 381518047. The next prime is 381518083. The reversal of 381518051 is 150815183.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381518051 - 2² = 381518047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381517999 and 381518017.

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 3 ways as a sum of consecutive naturals, for example, 116651 + ... + 119876.

It is an arithmetic number, because the mean of its divisors is an integer number (95439048).

Almost surely, 2^381518051 is an apocalyptic number.

381518051 is a deficient number, since it is larger than the sum of its proper divisors (238141).

381518051 is a wasteful number, since it uses less digits than its factorization.

381518051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238140.

The product of its (nonzero) digits is 4800, while the sum is 32.

The square root of 381518051 is about 19532.4870664235. The cubic root of 381518051 is about 725.2788786818.

The spelling of 381518051 in words is "three hundred eighty-one million, five hundred eighteen thousand, fifty-one".