1520272217 has 2 divisors, whose sum is σ = 1520272218. Its totient is φ = 1520272216.

The previous prime is 1520272211. The next prime is 1520272261. The reversal of 1520272217 is 7122720251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1067263561 + 453008656 = 32669^2 + 21284^2 .

It is a cyclic number.

It is not a de Polignac number, because 1520272217 - 2⁶ = 1520272153 is a prime.

It is a super-2 number, since 2×1520272217² = 4622455227564190178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1520272217.

It is not a weakly prime, because it can be changed into another prime (1520272211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760136108 + 760136109.

It is an arithmetic number, because the mean of its divisors is an integer number (760136109).

Almost surely, 2^1520272217 is an apocalyptic number.

It is an amenable number.

1520272217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520272217 is an equidigital number, since it uses as much as digits as its factorization.

1520272217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 1520272217 is about 38990.6683323074. The cubic root of 1520272217 is about 1149.8480497409.

Adding to 1520272217 its reverse (7122720251), we get a palindrome (8642992468).

The spelling of 1520272217 in words is "one billion, five hundred twenty million, two hundred seventy-two thousand, two hundred seventeen".