215054420 has 48 divisors (see below), whose sum is σ = 546497280. Its totient is φ = 69394944.

The previous prime is 215054383. The next prime is 215054429. The reversal of 215054420 is 24450512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215054429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42800 + ... + 47559.

It is an arithmetic number, because the mean of its divisors is an integer number (11385360).

Almost surely, 2^215054420 is an apocalyptic number.

215054420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215054420 is an abundant number, since it is smaller than the sum of its proper divisors (331442860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215054420 is a wasteful number, since it uses less digits than its factorization.

215054420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90392 (or 90390 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 215054420 is about 14664.7338878004. The cubic root of 215054420 is about 599.1231822382.

The spelling of 215054420 in words is "two hundred fifteen million, fifty-four thousand, four hundred twenty".