213444006497 has 2 divisors, whose sum is σ = 213444006498. Its totient is φ = 213444006496.

The previous prime is 213444006403. The next prime is 213444006541. The reversal of 213444006497 is 794600444312.

It is an a-pointer prime, because the next prime (213444006541) can be obtained adding 213444006497 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212572635136 + 871371361 = 461056^2 + 29519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213444006497 is a prime.

It is a super-2 number, since 2×213444006497² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213444906497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106722003248 + 106722003249.

It is an arithmetic number, because the mean of its divisors is an integer number (106722003249).

Almost surely, 2^213444006497 is an apocalyptic number.

It is an amenable number.

213444006497 is a deficient number, since it is larger than the sum of its proper divisors (1).

213444006497 is an equidigital number, since it uses as much as digits as its factorization.

213444006497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 44.

The spelling of 213444006497 in words is "two hundred thirteen billion, four hundred forty-four million, six thousand, four hundred ninety-seven".