381702155 has 4 divisors (see below), whose sum is σ = 458042592. Its totient is φ = 305361720.

The previous prime is 381702151. The next prime is 381702199. The reversal of 381702155 is 551207183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551207183 = 107 ⋅5151469.

It is not a de Polignac number, because 381702155 - 2² = 381702151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381702151) 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, 38170211 + ... + 38170220.

It is an arithmetic number, because the mean of its divisors is an integer number (114510648).

Almost surely, 2^381702155 is an apocalyptic number.

381702155 is a deficient number, since it is larger than the sum of its proper divisors (76340437).

381702155 is an equidigital number, since it uses as much as digits as its factorization.

381702155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76340436.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 381702155 is about 19537.1992619208. The cubic root of 381702155 is about 725.3955225907.

The spelling of 381702155 in words is "three hundred eighty-one million, seven hundred two thousand, one hundred fifty-five".