31430453 has 2 divisors, whose sum is σ = 31430454. Its totient is φ = 31430452.

The previous prime is 31430417. The next prime is 31430473. The reversal of 31430453 is 35403413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24581764 + 6848689 = 4958^2 + 2617^2 .

It is a cyclic number.

It is not a de Polignac number, because 31430453 - 2¹⁴ = 31414069 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31430473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715226 + 15715227.

It is an arithmetic number, because the mean of its divisors is an integer number (15715227).

Almost surely, 2^31430453 is an apocalyptic number.

It is an amenable number.

31430453 is a deficient number, since it is larger than the sum of its proper divisors (1).

31430453 is an equidigital number, since it uses as much as digits as its factorization.

31430453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 31430453 is about 5606.2869173812. The cubic root of 31430453 is about 315.5853832967.

Adding to 31430453 its reverse (35403413), we get a palindrome (66833866).

The spelling of 31430453 in words is "thirty-one million, four hundred thirty thousand, four hundred fifty-three".