215463812 has 12 divisors (see below), whose sum is σ = 377211660. Its totient is φ = 107689056.

The previous prime is 215463791. The next prime is 215463821. The reversal of 215463812 is 218364512.

It can be written as a sum of positive squares in 2 ways, for example, as 127554436 + 87909376 = 11294^2 + 9376^2 .

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, 2378 + ... + 20894.

It is an arithmetic number, because the mean of its divisors is an integer number (31434305).

Almost surely, 2^215463812 is an apocalyptic number.

It is an amenable number.

215463812 is a deficient number, since it is larger than the sum of its proper divisors (161747848).

215463812 is a wasteful number, since it uses less digits than its factorization.

215463812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21430 (or 21428 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 215463812 is about 14678.6856359825. The cubic root of 215463812 is about 599.5031182574.

The spelling of 215463812 in words is "two hundred fifteen million, four hundred sixty-three thousand, eight hundred twelve".