855005381 has 8 divisors (see below), whose sum is σ = 909014400. Its totient is φ = 802399312.

The previous prime is 855005353. The next prime is 855005401. The reversal of 855005381 is 183500558.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 855005381 - 2⁶ = 855005317 is a prime.

It is a super-2 number, since 2×855005381² = 1462068403077910322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855005881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349481 + ... + 351918.

It is an arithmetic number, because the mean of its divisors is an integer number (113626800).

Almost surely, 2^855005381 is an apocalyptic number.

It is an amenable number.

855005381 is a deficient number, since it is larger than the sum of its proper divisors (54009019).

855005381 is a wasteful number, since it uses less digits than its factorization.

855005381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701475.

The product of its (nonzero) digits is 24000, while the sum is 35.

The square root of 855005381 is about 29240.4750474407. The cubic root of 855005381 is about 949.1239869198.

The spelling of 855005381 in words is "eight hundred fifty-five million, five thousand, three hundred eighty-one".