241251561 has 8 divisors (see below), whose sum is σ = 357409760. Its totient is φ = 160834356.

The previous prime is 241251559. The next prime is 241251583. The reversal of 241251561 is 165152142.

241251561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 241251561 - 2¹ = 241251559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8935243 = 241251561 / (2 + 4 + 1 + 2 + 5 + 1 + 5 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (241251511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4467595 + ... + 4467648.

It is an arithmetic number, because the mean of its divisors is an integer number (44676220).

Almost surely, 2^241251561 is an apocalyptic number.

It is an amenable number.

241251561 is a deficient number, since it is larger than the sum of its proper divisors (116158199).

241251561 is an equidigital number, since it uses as much as digits as its factorization.

241251561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8935252 (or 8935246 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 241251561 is about 15532.2748172958. The cubic root of 241251561 is about 622.5248763466.

The spelling of 241251561 in words is "two hundred forty-one million, two hundred fifty-one thousand, five hundred sixty-one".