381545775 has 48 divisors (see below), whose sum is σ = 754847520. Its totient is φ = 187833600.

The previous prime is 381545761. The next prime is 381545797. The reversal of 381545775 is 577545183.

It is a happy number.

381545775 is a `hidden beast` number, since 38 + 1 + 545 + 7 + 75 = 666.

It is not a de Polignac number, because 381545775 - 2⁸ = 381545519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 381545775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12966 + ... + 30515.

It is an arithmetic number, because the mean of its divisors is an integer number (15725990).

Almost surely, 2^381545775 is an apocalyptic number.

381545775 is a deficient number, since it is larger than the sum of its proper divisors (373301745).

381545775 is a wasteful number, since it uses less digits than its factorization.

381545775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43513 (or 43502 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The square root of 381545775 is about 19533.1967429809. The cubic root of 381545775 is about 725.2964463474.

The spelling of 381545775 in words is "three hundred eighty-one million, five hundred forty-five thousand, seven hundred seventy-five".