31380671 has 8 divisors (see below), whose sum is σ = 37423104. Its totient is φ = 25728120.

The previous prime is 31380667. The next prime is 31380677. The reversal of 31380671 is 17608313.

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 31380671 - 2² = 31380667 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31380677) 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, 97295 + ... + 97616.

It is an arithmetic number, because the mean of its divisors is an integer number (4677888).

Almost surely, 2^31380671 is an apocalyptic number.

31380671 is a deficient number, since it is larger than the sum of its proper divisors (6042433).

31380671 is a wasteful number, since it uses less digits than its factorization.

31380671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194941.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 31380671 is about 5601.8453209634. The cubic root of 31380671 is about 315.4186790142.

Adding to 31380671 its reverse (17608313), we get a palindrome (48988984).

The spelling of 31380671 in words is "thirty-one million, three hundred eighty thousand, six hundred seventy-one".