381131835 has 32 divisors (see below), whose sum is σ = 699059712. Its totient is φ = 173698560.

The previous prime is 381131831. The next prime is 381131837. The reversal of 381131835 is 538131183.

It is not a de Polignac number, because 381131835 - 2² = 381131831 is a prime.

It is a super-2 number, since 2×381131835² = 290522951300934450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381131796 and 381131805.

It is not an unprimeable number, because it can be changed into a prime (381131831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30000 + ... + 40770.

It is an arithmetic number, because the mean of its divisors is an integer number (21845616).

Almost surely, 2^381131835 is an apocalyptic number.

381131835 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

381131835 is a deficient number, since it is larger than the sum of its proper divisors (317927877).

381131835 is a wasteful number, since it uses less digits than its factorization.

381131835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11123.

The product of its digits is 8640, while the sum is 33.

The square root of 381131835 is about 19522.5980596846. The cubic root of 381131835 is about 725.0340594384.

The spelling of 381131835 in words is "three hundred eighty-one million, one hundred thirty-one thousand, eight hundred thirty-five".