1115520397 has 2 divisors, whose sum is σ = 1115520398. Its totient is φ = 1115520396.

The previous prime is 1115520391. The next prime is 1115520403. The reversal of 1115520397 is 7930255111.

It is a balanced prime because it is at equal distance from previous prime (1115520391) and next prime (1115520403).

It can be written as a sum of positive squares in only one way, i.e., 1112489316 + 3031081 = 33354^2 + 1741^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115520397 - 2⁷ = 1115520269 is a prime.

It is a super-2 number, since 2×1115520397² = 2488771512246075218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115520391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557760198 + 557760199.

It is an arithmetic number, because the mean of its divisors is an integer number (557760199).

Almost surely, 2^1115520397 is an apocalyptic number.

It is an amenable number.

1115520397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115520397 is an equidigital number, since it uses as much as digits as its factorization.

1115520397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 1115520397 is about 33399.4071354568. The cubic root of 1115520397 is about 1037.1124279745.

The spelling of 1115520397 in words is "one billion, one hundred fifteen million, five hundred twenty thousand, three hundred ninety-seven".