381172731 has 8 divisors (see below), whose sum is σ = 510120720. Its totient is φ = 253169952.

The previous prime is 381172697. The next prime is 381172733. The reversal of 381172731 is 137271183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 381172731 - 2⁶ = 381172667 is a prime.

It is a super-2 number, since 2×381172731² = 290585301715996722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381172692 and 381172701.

It is not an unprimeable number, because it can be changed into a prime (381172733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235360 + ... + 236973.

It is an arithmetic number, because the mean of its divisors is an integer number (63765090).

Almost surely, 2^381172731 is an apocalyptic number.

381172731 is a deficient number, since it is larger than the sum of its proper divisors (128947989).

381172731 is a wasteful number, since it uses less digits than its factorization.

381172731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472605.

The product of its digits is 7056, while the sum is 33.

The square root of 381172731 is about 19523.6454331664. The cubic root of 381172731 is about 725.0599909138.

The spelling of 381172731 in words is "three hundred eighty-one million, one hundred seventy-two thousand, seven hundred thirty-one".