231061553 has 2 divisors, whose sum is σ = 231061554. Its totient is φ = 231061552.

The previous prime is 231061549. The next prime is 231061561. The reversal of 231061553 is 355160132.

231061553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180821809 + 50239744 = 13447^2 + 7088^2 .

It is a cyclic number.

It is not a de Polignac number, because 231061553 - 2² = 231061549 is a prime.

It is not a weakly prime, because it can be changed into another prime (231061573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115530776 + 115530777.

It is an arithmetic number, because the mean of its divisors is an integer number (115530777).

Almost surely, 2^231061553 is an apocalyptic number.

It is an amenable number.

231061553 is a deficient number, since it is larger than the sum of its proper divisors (1).

231061553 is an equidigital number, since it uses as much as digits as its factorization.

231061553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 231061553 is about 15200.7089637293. The cubic root of 231061553 is about 613.6337378899.

The spelling of 231061553 in words is "two hundred thirty-one million, sixty-one thousand, five hundred fifty-three".