240123553 has 2 divisors, whose sum is σ = 240123554. Its totient is φ = 240123552.

The previous prime is 240123547. The next prime is 240123557. The reversal of 240123553 is 355321042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199572129 + 40551424 = 14127^2 + 6368^2 .

It is a cyclic number.

It is not a de Polignac number, because 240123553 - 2⁹ = 240123041 is a prime.

It is not a weakly prime, because it can be changed into another prime (240123557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120061776 + 120061777.

It is an arithmetic number, because the mean of its divisors is an integer number (120061777).

Almost surely, 2^240123553 is an apocalyptic number.

It is an amenable number.

240123553 is a deficient number, since it is larger than the sum of its proper divisors (1).

240123553 is an equidigital number, since it uses as much as digits as its factorization.

240123553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 240123553 is about 15495.9205276744. The cubic root of 240123553 is about 621.5531239790.

Adding to 240123553 its reverse (355321042), we get a palindrome (595444595).

The spelling of 240123553 in words is "two hundred forty million, one hundred twenty-three thousand, five hundred fifty-three".