215054100 has 54 divisors (see below), whose sum is σ = 674077950. Its totient is φ = 57347520.

The previous prime is 215054087. The next prime is 215054153. The reversal of 215054100 is 1450512.

215054100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 197136 + 214856964 = 444^2 + 14658^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 118575 + ... + 120374.

It is an arithmetic number, because the mean of its divisors is an integer number (12482925).

Almost surely, 2^215054100 is an apocalyptic number.

215054100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215054100 is an abundant number, since it is smaller than the sum of its proper divisors (459023850).

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

215054100 is a wasteful number, since it uses less digits than its factorization.

215054100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238969 (or 238959 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 215054100 is about 14664.7229772676. The cubic root of 215054100 is about 599.1228850738.

The spelling of 215054100 in words is "two hundred fifteen million, fifty-four thousand, one hundred".