2115421075 has 6 divisors (see below), whose sum is σ = 2623122164. Its totient is φ = 1692336840.

The previous prime is 2115421051. The next prime is 2115421081. The reversal of 2115421075 is 5701245112.

It is not a de Polignac number, because 2115421075 - 2⁷ = 2115420947 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 42308397 + ... + 42308446.

Almost surely, 2^2115421075 is an apocalyptic number.

2115421075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2115421075 is a deficient number, since it is larger than the sum of its proper divisors (507701089).

2115421075 is an equidigital number, since it uses as much as digits as its factorization.

2115421075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84616853 (or 84616848 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 2115421075 is about 45993.7069064888. The cubic root of 2115421075 is about 1283.7061117919.

Adding to 2115421075 its reverse (5701245112), we get a palindrome (7816666187).

The spelling of 2115421075 in words is "two billion, one hundred fifteen million, four hundred twenty-one thousand, seventy-five".