215000420 has 12 divisors (see below), whose sum is σ = 451500924. Its totient is φ = 86000160.

The previous prime is 215000399. The next prime is 215000431. The reversal of 215000420 is 24000512.

It can be written as a sum of positive squares in 2 ways, for example, as 158810404 + 56190016 = 12602^2 + 7496^2 .

It is a junction number, because it is equal to n+sod(n) for n = 215000395 and 215000404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5374991 + ... + 5375030.

It is an arithmetic number, because the mean of its divisors is an integer number (37625077).

Almost surely, 2^215000420 is an apocalyptic number.

215000420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215000420 is an abundant number, since it is smaller than the sum of its proper divisors (236500504).

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

215000420 is a wasteful number, since it uses less digits than its factorization.

215000420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10750030 (or 10750028 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 215000420 is about 14662.8926204893. The cubic root of 215000420 is about 599.0730315831.

Adding to 215000420 its reverse (24000512), we get a palindrome (239000932).

The spelling of 215000420 in words is "two hundred fifteen million, four hundred twenty", and thus it is an aban number.