215880093 has 144 divisors (see below), whose sum is σ = 420577920. Its totient is φ = 108725760.

The previous prime is 215880083. The next prime is 215880103. The reversal of 215880093 is 390088512.

It is an interprime number because it is at equal distance from previous prime (215880083) and next prime (215880103).

It is not a de Polignac number, because 215880093 - 2⁶ = 215880029 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215880013) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 9386080 + ... + 9386102.

It is an arithmetic number, because the mean of its divisors is an integer number (2920680).

Almost surely, 2^215880093 is an apocalyptic number.

215880093 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

215880093 is a deficient number, since it is larger than the sum of its proper divisors (204697827).

215880093 is a wasteful number, since it uses less digits than its factorization.

215880093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 215880093 is about 14692.8585714285. The cubic root of 215880093 is about 599.8889544494. Note that the first 3 decimals are identical.

The spelling of 215880093 in words is "two hundred fifteen million, eight hundred eighty thousand, ninety-three".