205102250415 has 32 divisors (see below), whose sum is σ = 383817081600. Its totient is φ = 103630609440.

The previous prime is 205102250413. The next prime is 205102250417. The reversal of 205102250415 is 514052201502.

205102250415 is a `hidden beast` number, since 20 + 5 + 1 + 0 + 225 + 0 + 415 = 666.

It is an interprime number because it is at equal distance from previous prime (205102250413) and next prime (205102250417).

It is not a de Polignac number, because 205102250415 - 2¹ = 205102250413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205102250413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39978381 + ... + 39983510.

It is an arithmetic number, because the mean of its divisors is an integer number (11994283800).

Almost surely, 2^205102250415 is an apocalyptic number.

205102250415 is a deficient number, since it is larger than the sum of its proper divisors (178714831185).

205102250415 is a wasteful number, since it uses less digits than its factorization.

205102250415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79961924 (or 79961918 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 205102250415 its reverse (514052201502), we get a palindrome (719154451917).

The spelling of 205102250415 in words is "two hundred five billion, one hundred two million, two hundred fifty thousand, four hundred fifteen".