31503053 has 2 divisors, whose sum is σ = 31503054. Its totient is φ = 31503052.

The previous prime is 31502993. The next prime is 31503061. The reversal of 31503053 is 35030513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30448324 + 1054729 = 5518^2 + 1027^2 .

It is a cyclic number.

It is not a de Polignac number, because 31503053 - 2¹⁶ = 31437517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31503553) 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, 15751526 + 15751527.

It is an arithmetic number, because the mean of its divisors is an integer number (15751527).

Almost surely, 2^31503053 is an apocalyptic number.

It is an amenable number.

31503053 is a deficient number, since it is larger than the sum of its proper divisors (1).

31503053 is an equidigital number, since it uses as much as digits as its factorization.

31503053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 675, while the sum is 20.

The square root of 31503053 is about 5612.7580564282. The cubic root of 31503053 is about 315.8281826462.

Adding to 31503053 its reverse (35030513), we get a palindrome (66533566).

The spelling of 31503053 in words is "thirty-one million, five hundred three thousand, fifty-three".