1115450381 has 2 divisors, whose sum is σ = 1115450382. Its totient is φ = 1115450380.

The previous prime is 1115450377. The next prime is 1115450429. The reversal of 1115450381 is 1830545111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 892216900 + 223233481 = 29870^2 + 14941^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115450381 - 2² = 1115450377 is a prime.

It is a super-2 number, since 2×1115450381² = 2488459104946090322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115450351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557725190 + 557725191.

It is an arithmetic number, because the mean of its divisors is an integer number (557725191).

Almost surely, 2^1115450381 is an apocalyptic number.

It is an amenable number.

1115450381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115450381 is an equidigital number, since it uses as much as digits as its factorization.

1115450381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 1115450381 is about 33398.3589566913. The cubic root of 1115450381 is about 1037.0907292877.

Adding to 1115450381 its reverse (1830545111), we get a palindrome (2945995492).

The spelling of 1115450381 in words is "one billion, one hundred fifteen million, four hundred fifty thousand, three hundred eighty-one".