213765541001 has 2 divisors, whose sum is σ = 213765541002. Its totient is φ = 213765541000.

The previous prime is 213765540997. The next prime is 213765541009. The reversal of 213765541001 is 100145567312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213606654976 + 158886025 = 462176^2 + 12605^2 .

It is a cyclic number.

It is not a de Polignac number, because 213765541001 - 2² = 213765540997 is a prime.

It is not a weakly prime, because it can be changed into another prime (213765541009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106882770500 + 106882770501.

It is an arithmetic number, because the mean of its divisors is an integer number (106882770501).

Almost surely, 2^213765541001 is an apocalyptic number.

It is an amenable number.

213765541001 is a deficient number, since it is larger than the sum of its proper divisors (1).

213765541001 is an equidigital number, since it uses as much as digits as its factorization.

213765541001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 213765541001 in words is "two hundred thirteen billion, seven hundred sixty-five million, five hundred forty-one thousand, one".