31484161 has 2 divisors, whose sum is σ = 31484162. Its totient is φ = 31484160.

The previous prime is 31484143. The next prime is 31484177. The reversal of 31484161 is 16148413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30735936 + 748225 = 5544^2 + 865^2 .

It is an emirp because it is prime and its reverse (16148413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31484161 - 2⁵ = 31484129 is a prime.

It is not a weakly prime, because it can be changed into another prime (31484461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15742080 + 15742081.

It is an arithmetic number, because the mean of its divisors is an integer number (15742081).

Almost surely, 2^31484161 is an apocalyptic number.

It is an amenable number.

31484161 is a deficient number, since it is larger than the sum of its proper divisors (1).

31484161 is an equidigital number, since it uses as much as digits as its factorization.

31484161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 31484161 is about 5611.0748524681. The cubic root of 31484161 is about 315.7650372412.

The spelling of 31484161 in words is "thirty-one million, four hundred eighty-four thousand, one hundred sixty-one".