215420632 has 64 divisors (see below), whose sum is σ = 488275200. Its totient is φ = 87039360.

The previous prime is 215420629. The next prime is 215420633. The reversal of 215420632 is 236024512.

It is a junction number, because it is equal to n+sod(n) for n = 215420597 and 215420606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215420633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311407 + ... + 312097.

It is an arithmetic number, because the mean of its divisors is an integer number (7629300).

Almost surely, 2^215420632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215420632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244137600).

215420632 is an abundant number, since it is smaller than the sum of its proper divisors (272854568).

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

215420632 is a wasteful number, since it uses less digits than its factorization.

215420632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016 (or 1012 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 215420632 is about 14677.2147221467. The cubic root of 215420632 is about 599.4630677978.

The spelling of 215420632 in words is "two hundred fifteen million, four hundred twenty thousand, six hundred thirty-two".