381852157 has 4 divisors (see below), whose sum is σ = 381893436. Its totient is φ = 381810880.

The previous prime is 381852151. The next prime is 381852161. The reversal of 381852157 is 751258183.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 241926916 + 139925241 = 15554^2 + 11829^2 .

It is a cyclic number.

It is not a de Polignac number, because 381852157 - 2¹¹ = 381850109 is a prime.

It is a super-2 number, since 2×381852157² = 291622139611105298, 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 (381852151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357 + ... + 27637.

It is an arithmetic number, because the mean of its divisors is an integer number (95473359).

Almost surely, 2^381852157 is an apocalyptic number.

It is an amenable number.

381852157 is a deficient number, since it is larger than the sum of its proper divisors (41279).

381852157 is a wasteful number, since it uses less digits than its factorization.

381852157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41278.

The product of its digits is 67200, while the sum is 40.

The square root of 381852157 is about 19541.0377667103. The cubic root of 381852157 is about 725.4905325588.

The spelling of 381852157 in words is "three hundred eighty-one million, eight hundred fifty-two thousand, one hundred fifty-seven".