190520217 has 12 divisors (see below), whose sum is σ = 275335060. Its totient is φ = 126949248.

The previous prime is 190520189. The next prime is 190520219. The reversal of 190520217 is 712025091.

It can be written as a sum of positive squares in 2 ways, for example, as 90839961 + 99680256 = 9531^2 + 9984^2 .

It is not a de Polignac number, because 190520217 - 2⁷ = 190520089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190520219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19509 + ... + 27597.

Almost surely, 2^190520217 is an apocalyptic number.

It is an amenable number.

190520217 is a deficient number, since it is larger than the sum of its proper divisors (84814843).

190520217 is a wasteful number, since it uses less digits than its factorization.

190520217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10712 (or 10709 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 190520217 is about 13802.9061070486. The cubic root of 190520217 is about 575.4139094143.

It can be divided in two parts, 1905 and 20217, that added together give a palindrome (22122).

The spelling of 190520217 in words is "one hundred ninety million, five hundred twenty thousand, two hundred seventeen".