31228071 has 8 divisors (see below), whose sum is σ = 47585664. Its totient is φ = 17844600.

The previous prime is 31228063. The next prime is 31228073. The reversal of 31228071 is 17082213.

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

It is not a de Polignac number, because 31228071 - 2³ = 31228063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31228073) 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, 743505 + ... + 743546.

It is an arithmetic number, because the mean of its divisors is an integer number (5948208).

Almost surely, 2^31228071 is an apocalyptic number.

31228071 is a deficient number, since it is larger than the sum of its proper divisors (16357593).

31228071 is a wasteful number, since it uses less digits than its factorization.

31228071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487061.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 31228071 is about 5588.2082101511. The cubic root of 31228071 is about 314.9065684101.

The spelling of 31228071 in words is "thirty-one million, two hundred twenty-eight thousand, seventy-one".