216241131261 has 8 divisors (see below), whose sum is σ = 291293895424. Its totient is φ = 142674560640.

The previous prime is 216241131259. The next prime is 216241131269. The reversal of 216241131261 is 162131142612.

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

It is not a de Polignac number, because 216241131261 - 2¹ = 216241131259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216241131269) 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, 371548045 + ... + 371548626.

It is an arithmetic number, because the mean of its divisors is an integer number (36411736928).

Almost surely, 2^216241131261 is an apocalyptic number.

It is an amenable number.

216241131261 is a deficient number, since it is larger than the sum of its proper divisors (75052764163).

216241131261 is an equidigital number, since it uses as much as digits as its factorization.

216241131261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743096771.

The product of its digits is 3456, while the sum is 30.

Adding to 216241131261 its reverse (162131142612), we get a palindrome (378372273873).

The spelling of 216241131261 in words is "two hundred sixteen billion, two hundred forty-one million, one hundred thirty-one thousand, two hundred sixty-one".