381315901 has 4 divisors (see below), whose sum is σ = 384690492. Its totient is φ = 377941312.

The previous prime is 381315889. The next prime is 381315911. The reversal of 381315901 is 109513183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96550276 + 284765625 = 9826^2 + 16875^2 .

It is a cyclic number.

It is not a de Polignac number, because 381315901 - 2¹³ = 381307709 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 (381315911) 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, 1687126 + ... + 1687351.

It is an arithmetic number, because the mean of its divisors is an integer number (96172623).

Almost surely, 2^381315901 is an apocalyptic number.

It is an amenable number.

381315901 is a deficient number, since it is larger than the sum of its proper divisors (3374591).

381315901 is a wasteful number, since it uses less digits than its factorization.

381315901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374590.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 381315901 is about 19527.3116685324. The cubic root of 381315901 is about 725.1507580266.

The spelling of 381315901 in words is "three hundred eighty-one million, three hundred fifteen thousand, nine hundred one".