395131881 has 8 divisors (see below), whose sum is σ = 549748800. Its totient is φ = 251968112.

The previous prime is 395131879. The next prime is 395131949. The reversal of 395131881 is 188131593.

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 395131881 - 2¹ = 395131879 is a prime.

It is a super-2 number, since 2×395131881² = 312258406765196322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (395131811) 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, 2863206 + ... + 2863343.

It is an arithmetic number, because the mean of its divisors is an integer number (68718600).

Almost surely, 2^395131881 is an apocalyptic number.

It is an amenable number.

395131881 is a deficient number, since it is larger than the sum of its proper divisors (154616919).

395131881 is a wasteful number, since it uses less digits than its factorization.

395131881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726575.

The product of its digits is 25920, while the sum is 39.

The square root of 395131881 is about 19877.9244640883. The cubic root of 395131881 is about 733.8050405695.

The spelling of 395131881 in words is "three hundred ninety-five million, one hundred thirty-one thousand, eight hundred eighty-one".