655231553 has 2 divisors, whose sum is σ = 655231554. Its totient is φ = 655231552.

The previous prime is 655231547. The next prime is 655231571. The reversal of 655231553 is 355132556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654745744 + 485809 = 25588^2 + 697^2 .

It is a cyclic number.

It is not a de Polignac number, because 655231553 - 2¹² = 655227457 is a prime.

It is not a weakly prime, because it can be changed into another prime (655231573) 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 as a sum of consecutive naturals, namely, 327615776 + 327615777.

It is an arithmetic number, because the mean of its divisors is an integer number (327615777).

Almost surely, 2^655231553 is an apocalyptic number.

It is an amenable number.

655231553 is a deficient number, since it is larger than the sum of its proper divisors (1).

655231553 is an equidigital number, since it uses as much as digits as its factorization.

655231553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67500, while the sum is 35.

The square root of 655231553 is about 25597.4911465948. The cubic root of 655231553 is about 868.5568857510.

It can be divided in two parts, 65523 and 1553, that added together give a palindrome (67076).

The spelling of 655231553 in words is "six hundred fifty-five million, two hundred thirty-one thousand, five hundred fifty-three".