31998127 has 10 divisors (see below), whose sum is σ = 37331728. Its totient is φ = 27424908.

The previous prime is 31998121. The next prime is 31998133. The reversal of 31998127 is 72189913.

It is an interprime number because it is at equal distance from previous prime (31998121) and next prime (31998133).

It is not a de Polignac number, because 31998127 - 2¹⁹ = 31473839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31998127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31998121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4263 + ... + 9064.

Almost surely, 2^31998127 is an apocalyptic number.

31998127 is a deficient number, since it is larger than the sum of its proper divisors (5333601).

31998127 is an frugal number, since it uses more digits than its factorization.

31998127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13355 (or 13334 counting only the distinct ones).

The product of its digits is 27216, while the sum is 40.

The square root of 31998127 is about 5656.6886956947. The cubic root of 31998127 is about 317.4740161016.

The spelling of 31998127 in words is "thirty-one million, nine hundred ninety-eight thousand, one hundred twenty-seven".