231553573 has 2 divisors, whose sum is σ = 231553574. Its totient is φ = 231553572.

The previous prime is 231553571. The next prime is 231553607. The reversal of 231553573 is 375355132.

It is an a-pointer prime, because the next prime (231553607) can be obtained adding 231553573 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160959969 + 70593604 = 12687^2 + 8402^2 .

It is a cyclic number.

It is not a de Polignac number, because 231553573 - 2¹ = 231553571 is a prime.

Together with 231553571, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231553571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115776786 + 115776787.

It is an arithmetic number, because the mean of its divisors is an integer number (115776787).

Almost surely, 2^231553573 is an apocalyptic number.

It is an amenable number.

231553573 is a deficient number, since it is larger than the sum of its proper divisors (1).

231553573 is an equidigital number, since it uses as much as digits as its factorization.

231553573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47250, while the sum is 34.

The square root of 231553573 is about 15216.8844708764. The cubic root of 231553573 is about 614.0689841395.

The spelling of 231553573 in words is "two hundred thirty-one million, five hundred fifty-three thousand, five hundred seventy-three".