31484457 has 10 divisors (see below), whose sum is σ = 47032458. Its totient is φ = 20989584.

The previous prime is 31484449. The next prime is 31484461. The reversal of 31484457 is 75448413.

It can be written as a sum of positive squares in only one way, i.e., 30239001 + 1245456 = 5499^2 + 1116^2 .

It is not a de Polignac number, because 31484457 - 2³ = 31484449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31484417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 194268 + ... + 194429.

Almost surely, 2^31484457 is an apocalyptic number.

It is an amenable number.

31484457 is a deficient number, since it is larger than the sum of its proper divisors (15548001).

31484457 is an equidigital number, since it uses as much as digits as its factorization.

31484457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388709 (or 388700 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 31484457 is about 5611.1012288142. The cubic root of 31484457 is about 315.7660267986.

The spelling of 31484457 in words is "thirty-one million, four hundred eighty-four thousand, four hundred fifty-seven".