31359457 has 2 divisors, whose sum is σ = 31359458. Its totient is φ = 31359456.

The previous prime is 31359451. The next prime is 31359463. The reversal of 31359457 is 75495313.

It is a balanced prime because it is at equal distance from previous prime (31359451) and next prime (31359463).

It can be written as a sum of positive squares in only one way, i.e., 30902481 + 456976 = 5559^2 + 676^2 .

It is an emirp because it is prime and its reverse (75495313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31359457 - 2¹¹ = 31357409 is a prime.

It is a super-3 number, since 3×31359457³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31359451) 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, 15679728 + 15679729.

It is an arithmetic number, because the mean of its divisors is an integer number (15679729).

Almost surely, 2^31359457 is an apocalyptic number.

It is an amenable number.

31359457 is a deficient number, since it is larger than the sum of its proper divisors (1).

31359457 is an equidigital number, since it uses as much as digits as its factorization.

31359457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 37.

The square root of 31359457 is about 5599.9515176473. The cubic root of 31359457 is about 315.3475864167.

The spelling of 31359457 in words is "thirty-one million, three hundred fifty-nine thousand, four hundred fifty-seven".