205102250389 has 2 divisors, whose sum is σ = 205102250390. Its totient is φ = 205102250388.

The previous prime is 205102250329. The next prime is 205102250413. The reversal of 205102250389 is 983052201502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191191935025 + 13910315364 = 437255^2 + 117942^2 .

It is a cyclic number.

It is not a de Polignac number, because 205102250389 - 2¹³ = 205102242197 is a prime.

It is a super-2 number, since 2×205102250389² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205102250329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102551125194 + 102551125195.

It is an arithmetic number, because the mean of its divisors is an integer number (102551125195).

Almost surely, 2^205102250389 is an apocalyptic number.

It is an amenable number.

205102250389 is a deficient number, since it is larger than the sum of its proper divisors (1).

205102250389 is an equidigital number, since it uses as much as digits as its factorization.

205102250389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 205102250389 in words is "two hundred five billion, one hundred two million, two hundred fifty thousand, three hundred eighty-nine".