31980427 has 2 divisors, whose sum is σ = 31980428. Its totient is φ = 31980426.

The previous prime is 31980397. The next prime is 31980457. The reversal of 31980427 is 72408913.

It is a balanced prime because it is at equal distance from previous prime (31980397) and next prime (31980457).

It is an emirp because it is prime and its reverse (72408913) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31980427 is a prime.

It is a super-2 number, since 2×31980427² = 2045495422204658, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31980392 and 31980401.

It is not a weakly prime, because it can be changed into another prime (31980457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15990213 + 15990214.

It is an arithmetic number, because the mean of its divisors is an integer number (15990214).

Almost surely, 2^31980427 is an apocalyptic number.

31980427 is a deficient number, since it is larger than the sum of its proper divisors (1).

31980427 is an equidigital number, since it uses as much as digits as its factorization.

31980427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 31980427 is about 5655.1239597378. The cubic root of 31980427 is about 317.4154676068.

The spelling of 31980427 in words is "thirty-one million, nine hundred eighty thousand, four hundred twenty-seven".