231553123 has 2 divisors, whose sum is σ = 231553124. Its totient is φ = 231553122.

The previous prime is 231553109. The next prime is 231553129. The reversal of 231553123 is 321355132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231553123 is a prime.

It is equal to p_12723316 and since 231553123 and 12723316 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (231553129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115776561 + 115776562.

It is an arithmetic number, because the mean of its divisors is an integer number (115776562).

Almost surely, 2^231553123 is an apocalyptic number.

231553123 is a deficient number, since it is larger than the sum of its proper divisors (1).

231553123 is an equidigital number, since it uses as much as digits as its factorization.

231553123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 25.

The square root of 231553123 is about 15216.8696846625. The cubic root of 231553123 is about 614.0685863464.

The spelling of 231553123 in words is "two hundred thirty-one million, five hundred fifty-three thousand, one hundred twenty-three".