1115213137 has 2 divisors, whose sum is σ = 1115213138. Its totient is φ = 1115213136.

The previous prime is 1115213131. The next prime is 1115213147. The reversal of 1115213137 is 7313125111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 911979601 + 203233536 = 30199^2 + 14256^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115213137 - 2³ = 1115213129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1115213131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557606568 + 557606569.

It is an arithmetic number, because the mean of its divisors is an integer number (557606569).

Almost surely, 2^1115213137 is an apocalyptic number.

It is an amenable number.

1115213137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115213137 is an equidigital number, since it uses as much as digits as its factorization.

1115213137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 630, while the sum is 25.

The square root of 1115213137 is about 33394.8070364241. The cubic root of 1115213137 is about 1037.0171981524.

Adding to 1115213137 its reverse (7313125111), we get a palindrome (8428338248).

The spelling of 1115213137 in words is "one billion, one hundred fifteen million, two hundred thirteen thousand, one hundred thirty-seven".