1015220117 has 2 divisors, whose sum is σ = 1015220118. Its totient is φ = 1015220116.

The previous prime is 1015220111. The next prime is 1015220201. The reversal of 1015220117 is 7110225101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 964040401 + 51179716 = 31049^2 + 7154^2 .

It is a cyclic number.

It is not a de Polignac number, because 1015220117 - 2⁶ = 1015220053 is a prime.

It is a super-2 number, since 2×1015220117² = 2061343771922987378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1015220111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507610058 + 507610059.

It is an arithmetic number, because the mean of its divisors is an integer number (507610059).

Almost surely, 2^1015220117 is an apocalyptic number.

It is an amenable number.

1015220117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1015220117 is an equidigital number, since it uses as much as digits as its factorization.

1015220117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 20.

The square root of 1015220117 is about 31862.5189996020. The cubic root of 1015220117 is about 1005.0478486826.

Adding to 1015220117 its reverse (7110225101), we get a palindrome (8125445218).

The spelling of 1015220117 in words is "one billion, fifteen million, two hundred twenty thousand, one hundred seventeen".