381338157 has 4 divisors (see below), whose sum is σ = 508450880. Its totient is φ = 254225436.

The previous prime is 381338143. The next prime is 381338159. The reversal of 381338157 is 751833183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 381338157 - 2⁴ = 381338141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381338159) 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, 63556357 + ... + 63556362.

It is an arithmetic number, because the mean of its divisors is an integer number (127112720).

Almost surely, 2^381338157 is an apocalyptic number.

It is an amenable number.

381338157 is a deficient number, since it is larger than the sum of its proper divisors (127112723).

381338157 is a wasteful number, since it uses less digits than its factorization.

381338157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127112722.

The product of its digits is 60480, while the sum is 39.

The square root of 381338157 is about 19527.8815287271. The cubic root of 381338157 is about 725.1648658755.

The spelling of 381338157 in words is "three hundred eighty-one million, three hundred thirty-eight thousand, one hundred fifty-seven".