215421146 has 8 divisors (see below), whose sum is σ = 323222400. Its totient is φ = 107680348.

The previous prime is 215421137. The next prime is 215421179. The reversal of 215421146 is 641124512.

215421146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 4796 + ... + 21303.

It is an arithmetic number, because the mean of its divisors is an integer number (40402800).

Almost surely, 2^215421146 is an apocalyptic number.

215421146 is a deficient number, since it is larger than the sum of its proper divisors (107801254).

215421146 is a wasteful number, since it uses less digits than its factorization.

215421146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30228.

The product of its digits is 1920, while the sum is 26.

The square root of 215421146 is about 14677.2322322705. The cubic root of 215421146 is about 599.4635445763.

Adding to 215421146 its reverse (641124512), we get a palindrome (856545658).

The spelling of 215421146 in words is "two hundred fifteen million, four hundred twenty-one thousand, one hundred forty-six".