31534728553 has 2 divisors, whose sum is σ = 31534728554. Its totient is φ = 31534728552.

The previous prime is 31534728509. The next prime is 31534728571. The reversal of 31534728553 is 35582743513.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22382553664 + 9152174889 = 149608^2 + 95667^2 .

It is a cyclic number.

It is not a de Polignac number, because 31534728553 - 2¹⁷ = 31534597481 is a prime.

It is a super-2 number, since 2×31534728553² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31534728503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15767364276 + 15767364277.

It is an arithmetic number, because the mean of its divisors is an integer number (15767364277).

Almost surely, 2^31534728553 is an apocalyptic number.

It is an amenable number.

31534728553 is a deficient number, since it is larger than the sum of its proper divisors (1).

31534728553 is an equidigital number, since it uses as much as digits as its factorization.

31534728553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512000, while the sum is 46.

The spelling of 31534728553 in words is "thirty-one billion, five hundred thirty-four million, seven hundred twenty-eight thousand, five hundred fifty-three".