381215955 has 16 divisors (see below), whose sum is σ = 610193664. Its totient is φ = 203232480.

The previous prime is 381215953. The next prime is 381215963. The reversal of 381215955 is 559512183.

It is not a de Polignac number, because 381215955 - 2¹ = 381215953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381215951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57250 + ... + 63560.

It is an arithmetic number, because the mean of its divisors is an integer number (38137104).

Almost surely, 2^381215955 is an apocalyptic number.

381215955 is a deficient number, since it is larger than the sum of its proper divisors (228977709).

381215955 is a wasteful number, since it uses less digits than its factorization.

381215955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10346.

The product of its digits is 54000, while the sum is 39.

The square root of 381215955 is about 19524.7523671877. The cubic root of 381215955 is about 725.0873965193.

The spelling of 381215955 in words is "three hundred eighty-one million, two hundred fifteen thousand, nine hundred fifty-five".