83837465221 has 2 divisors, whose sum is σ = 83837465222. Its totient is φ = 83837465220.

The previous prime is 83837465207. The next prime is 83837465263. The reversal of 83837465221 is 12256473838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42019260196 + 41818205025 = 204986^2 + 204495^2 .

It is a cyclic number.

It is not a de Polignac number, because 83837465221 - 2⁵ = 83837465189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83837465521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41918732610 + 41918732611.

It is an arithmetic number, because the mean of its divisors is an integer number (41918732611).

Almost surely, 2^83837465221 is an apocalyptic number.

It is an amenable number.

83837465221 is a deficient number, since it is larger than the sum of its proper divisors (1).

83837465221 is an equidigital number, since it uses as much as digits as its factorization.

83837465221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 49.

The spelling of 83837465221 in words is "eighty-three billion, eight hundred thirty-seven million, four hundred sixty-five thousand, two hundred twenty-one".