241661261521 has 8 divisors (see below), whose sum is σ = 250001263080. Its totient is φ = 233321716992.

The previous prime is 241661261519. The next prime is 241661261549. The reversal of 241661261521 is 125162166142.

It can be written as a sum of positive squares in 4 ways, for example, as 46155795921 + 195505465600 = 214839^2 + 442160^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 241661261521 - 2¹ = 241661261519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (241661261221) 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, 1229571 + ... + 1412503.

It is an arithmetic number, because the mean of its divisors is an integer number (31250157885).

Almost surely, 2^241661261521 is an apocalyptic number.

It is an amenable number.

241661261521 is a deficient number, since it is larger than the sum of its proper divisors (8340001559).

241661261521 is a wasteful number, since it uses less digits than its factorization.

241661261521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228515.

The product of its digits is 34560, while the sum is 37.

The spelling of 241661261521 in words is "two hundred forty-one billion, six hundred sixty-one million, two hundred sixty-one thousand, five hundred twenty-one".