31478671 has 8 divisors (see below), whose sum is σ = 37136384. Its totient is φ = 26111160.

The previous prime is 31478647. The next prime is 31478701. The reversal of 31478671 is 17687413.

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 31478671 - 2⁵ = 31478639 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 31478671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31478171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72315 + ... + 72748.

It is an arithmetic number, because the mean of its divisors is an integer number (4642048).

Almost surely, 2^31478671 is an apocalyptic number.

31478671 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31478671 is a deficient number, since it is larger than the sum of its proper divisors (5657713).

31478671 is a wasteful number, since it uses less digits than its factorization.

31478671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145101.

The product of its digits is 28224, while the sum is 37.

The square root of 31478671 is about 5610.5856200579. The cubic root of 31478671 is about 315.7466825006.

The spelling of 31478671 in words is "thirty-one million, four hundred seventy-eight thousand, six hundred seventy-one".