1905217055 has 16 divisors (see below), whose sum is σ = 2614448640. Its totient is φ = 1305644832.

The previous prime is 1905217019. The next prime is 1905217057. The reversal of 1905217055 is 5507125091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1905217055 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1905217057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45566 + ... + 76724.

It is an arithmetic number, because the mean of its divisors is an integer number (163403040).

Almost surely, 2^1905217055 is an apocalyptic number.

1905217055 is a deficient number, since it is larger than the sum of its proper divisors (709231585).

1905217055 is a wasteful number, since it uses less digits than its factorization.

1905217055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32918.

The product of its (nonzero) digits is 15750, while the sum is 35.

The square root of 1905217055 is about 43648.7921367820. The cubic root of 1905217055 is about 1239.6949160564.

The spelling of 1905217055 in words is "one billion, nine hundred five million, two hundred seventeen thousand, fifty-five".