242644261631 has 2 divisors, whose sum is σ = 242644261632. Its totient is φ = 242644261630.

The previous prime is 242644261621. The next prime is 242644261697. The reversal of 242644261631 is 136162446242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242644261631 - 2⁶ = 242644261567 is a prime.

It is a super-2 number, since 2×242644261631² (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 (242644261621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121322130815 + 121322130816.

It is an arithmetic number, because the mean of its divisors is an integer number (121322130816).

Almost surely, 2^242644261631 is an apocalyptic number.

242644261631 is a deficient number, since it is larger than the sum of its proper divisors (1).

242644261631 is an equidigital number, since it uses as much as digits as its factorization.

242644261631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 41.

The spelling of 242644261631 in words is "two hundred forty-two billion, six hundred forty-four million, two hundred sixty-one thousand, six hundred thirty-one".