31230071 has 8 divisors (see below), whose sum is σ = 34207920. Its totient is φ = 28379008.

The previous prime is 31230061. The next prime is 31230077. The reversal of 31230071 is 17003213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31230071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230077) 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, 31181 + ... + 32166.

It is an arithmetic number, because the mean of its divisors is an integer number (4275990).

Almost surely, 2^31230071 is an apocalyptic number.

31230071 is a deficient number, since it is larger than the sum of its proper divisors (2977849).

31230071 is a wasteful number, since it uses less digits than its factorization.

31230071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63393.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 31230071 is about 5588.3871555217. The cubic root of 31230071 is about 314.9132909909.

Adding to 31230071 its reverse (17003213), we get a palindrome (48233284).

The spelling of 31230071 in words is "thirty-one million, two hundred thirty thousand, seventy-one".