82901400221 has 2 divisors, whose sum is σ = 82901400222. Its totient is φ = 82901400220.

The previous prime is 82901400203. The next prime is 82901400247. The reversal of 82901400221 is 12200410928.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48481874596 + 34419525625 = 220186^2 + 185525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82901400221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82901400271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41450700110 + 41450700111.

It is an arithmetic number, because the mean of its divisors is an integer number (41450700111).

Almost surely, 2^82901400221 is an apocalyptic number.

It is an amenable number.

82901400221 is a deficient number, since it is larger than the sum of its proper divisors (1).

82901400221 is an equidigital number, since it uses as much as digits as its factorization.

82901400221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 82901400221 in words is "eighty-two billion, nine hundred one million, four hundred thousand, two hundred twenty-one".