381701831 has 4 divisors (see below), whose sum is σ = 436230672. Its totient is φ = 327172992.

The previous prime is 381701821. The next prime is 381701861. The reversal of 381701831 is 138107183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138107183 = 1129 ⋅122327.

It is a cyclic number.

It is not a de Polignac number, because 381701831 - 2¹⁰ = 381700807 is a prime.

It is a super-2 number, since 2×381701831² = 291392575577505122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381701821) 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, 27264410 + ... + 27264423.

It is an arithmetic number, because the mean of its divisors is an integer number (109057668).

Almost surely, 2^381701831 is an apocalyptic number.

381701831 is a deficient number, since it is larger than the sum of its proper divisors (54528841).

381701831 is an equidigital number, since it uses as much as digits as its factorization.

381701831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54528840.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 381701831 is about 19537.1909700448. The cubic root of 381701831 is about 725.3953173450.

The spelling of 381701831 in words is "three hundred eighty-one million, seven hundred one thousand, eight hundred thirty-one".