215218148 has 12 divisors (see below), whose sum is σ = 379342320. Its totient is φ = 106834632.

The previous prime is 215218141. The next prime is 215218163. The reversal of 215218148 is 841812512.

It is not an unprimeable number, because it can be changed into a prime (215218141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192986 + ... + 194097.

It is an arithmetic number, because the mean of its divisors is an integer number (31611860).

Almost surely, 2^215218148 is an apocalyptic number.

It is an amenable number.

215218148 is a deficient number, since it is larger than the sum of its proper divisors (164124172).

215218148 is a wasteful number, since it uses less digits than its factorization.

215218148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387226 (or 387224 counting only the distinct ones).

The product of its digits is 5120, while the sum is 32.

The square root of 215218148 is about 14670.3151977045. The cubic root of 215218148 is about 599.2751877275.

The spelling of 215218148 in words is "two hundred fifteen million, two hundred eighteen thousand, one hundred forty-eight".