215425620 has 36 divisors (see below), whose sum is σ = 653458260. Its totient is φ = 57446784.

The previous prime is 215425537. The next prime is 215425631. The reversal of 215425620 is 26524512.

215425620 is a `hidden beast` number, since 2 + 15 + 4 + 25 + 620 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31877316 + 183548304 = 5646^2 + 13548^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 598225 + ... + 598584.

Almost surely, 2^215425620 is an apocalyptic number.

215425620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215425620 is an abundant number, since it is smaller than the sum of its proper divisors (438032640).

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

215425620 is a wasteful number, since it uses less digits than its factorization.

215425620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196824 (or 1196819 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 215425620 is about 14677.3846444113. The cubic root of 215425620 is about 599.4676945578.

The spelling of 215425620 in words is "two hundred fifteen million, four hundred twenty-five thousand, six hundred twenty".