31484281 has 2 divisors, whose sum is σ = 31484282. Its totient is φ = 31484280.

The previous prime is 31484267. The next prime is 31484303. The reversal of 31484281 is 18248413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26101881 + 5382400 = 5109^2 + 2320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31484281 is a prime.

It is a super-2 number, since 2×31484281² = 1982519900173922, which contains 22 as substring.

It is equal to p_1943932 and since 31484281 and 1943932 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (31484081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15742140 + 15742141.

It is an arithmetic number, because the mean of its divisors is an integer number (15742141).

Almost surely, 2^31484281 is an apocalyptic number.

It is an amenable number.

31484281 is a deficient number, since it is larger than the sum of its proper divisors (1).

31484281 is an equidigital number, since it uses as much as digits as its factorization.

31484281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 31.

The square root of 31484281 is about 5611.0855455963. The cubic root of 31484281 is about 315.7654384139.

The spelling of 31484281 in words is "thirty-one million, four hundred eighty-four thousand, two hundred eighty-one".