315271891 has 8 divisors (see below), whose sum is σ = 355027968. Its totient is φ = 277365000.

The previous prime is 315271871. The next prime is 315271897. The reversal of 315271891 is 198172513.

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

It is a de Polignac number, because none of the positive numbers 2^k-315271891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315271891.

It is not an unprimeable number, because it can be changed into a prime (315271897) 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, 461935 + ... + 462616.

It is an arithmetic number, because the mean of its divisors is an integer number (44378496).

Almost surely, 2^315271891 is an apocalyptic number.

315271891 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

315271891 is a deficient number, since it is larger than the sum of its proper divisors (39756077).

315271891 is a wasteful number, since it uses less digits than its factorization.

315271891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924593.

The product of its digits is 15120, while the sum is 37.

The square root of 315271891 is about 17755.8973583427. The cubic root of 315271891 is about 680.6049194683.

The spelling of 315271891 in words is "three hundred fifteen million, two hundred seventy-one thousand, eight hundred ninety-one".