240861553 has 2 divisors, whose sum is σ = 240861554. Its totient is φ = 240861552.

The previous prime is 240861539. The next prime is 240861557. The reversal of 240861553 is 355168042.

240861553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194239969 + 46621584 = 13937^2 + 6828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240861553 is a prime.

It is not a weakly prime, because it can be changed into another prime (240861557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120430776 + 120430777.

It is an arithmetic number, because the mean of its divisors is an integer number (120430777).

Almost surely, 2^240861553 is an apocalyptic number.

It is an amenable number.

240861553 is a deficient number, since it is larger than the sum of its proper divisors (1).

240861553 is an equidigital number, since it uses as much as digits as its factorization.

240861553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 240861553 is about 15519.7149780529. The cubic root of 240861553 is about 622.1892368864.

The spelling of 240861553 in words is "two hundred forty million, eight hundred sixty-one thousand, five hundred fifty-three".