118815451 has 2 divisors, whose sum is σ = 118815452. Its totient is φ = 118815450.

The previous prime is 118815391. The next prime is 118815461. The reversal of 118815451 is 154518811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 118815451 - 2⁹ = 118814939 is a prime.

It is a super-2 number, since 2×118815451² = 28234222792666802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (118815461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59407725 + 59407726.

It is an arithmetic number, because the mean of its divisors is an integer number (59407726).

Almost surely, 2^118815451 is an apocalyptic number.

118815451 is a deficient number, since it is larger than the sum of its proper divisors (1).

118815451 is an equidigital number, since it uses as much as digits as its factorization.

118815451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6400, while the sum is 34.

The square root of 118815451 is about 10900.2500430036. The cubic root of 118815451 is about 491.6140734449.

The spelling of 118815451 in words is "one hundred eighteen million, eight hundred fifteen thousand, four hundred fifty-one".