31482457 has 4 divisors (see below), whose sum is σ = 31494580. Its totient is φ = 31470336.

The previous prime is 31482439. The next prime is 31482499. The reversal of 31482457 is 75428413.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 23580736 + 7901721 = 4856^2 + 2811^2 .

It is a cyclic number.

It is not a de Polignac number, because 31482457 - 2¹⁵ = 31449689 is a prime.

It is a super-2 number, since 2×31482457² = 1982290197513698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31482427) 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 3 ways as a sum of consecutive naturals, for example, 408 + ... + 7945.

It is an arithmetic number, because the mean of its divisors is an integer number (7873645).

Almost surely, 2^31482457 is an apocalyptic number.

It is an amenable number.

31482457 is a deficient number, since it is larger than the sum of its proper divisors (12123).

31482457 is an equidigital number, since it uses as much as digits as its factorization.

31482457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122.

The product of its digits is 26880, while the sum is 34.

The square root of 31482457 is about 5610.9230078482. The cubic root of 31482457 is about 315.7593404790.

The spelling of 31482457 in words is "thirty-one million, four hundred eighty-two thousand, four hundred fifty-seven".