241553531381 has 2 divisors, whose sum is σ = 241553531382. Its totient is φ = 241553531380.

The previous prime is 241553531363. The next prime is 241553531473. The reversal of 241553531381 is 183135355142.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223909722481 + 17643808900 = 473191^2 + 132830^2 .

It is a cyclic number.

It is not a de Polignac number, because 241553531381 - 2²² = 241549337077 is a prime.

It is a super-2 number, since 2×241553531381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (241553531321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120776765690 + 120776765691.

It is an arithmetic number, because the mean of its divisors is an integer number (120776765691).

Almost surely, 2^241553531381 is an apocalyptic number.

It is an amenable number.

241553531381 is a deficient number, since it is larger than the sum of its proper divisors (1).

241553531381 is an equidigital number, since it uses as much as digits as its factorization.

241553531381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 41.

The spelling of 241553531381 in words is "two hundred forty-one billion, five hundred fifty-three million, five hundred thirty-one thousand, three hundred eighty-one".