216231148 has 24 divisors (see below), whose sum is σ = 436436000. Its totient is φ = 91819008.

The previous prime is 216231131. The next prime is 216231157. The reversal of 216231148 is 841132612.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32373 + ... + 38476.

Almost surely, 2^216231148 is an apocalyptic number.

216231148 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216231148 is an abundant number, since it is smaller than the sum of its proper divisors (220204852).

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

216231148 is a wasteful number, since it uses less digits than its factorization.

216231148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70969 (or 70967 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 216231148 is about 14704.8001686524. The cubic root of 216231148 is about 600.2139496261.

The spelling of 216231148 in words is "two hundred sixteen million, two hundred thirty-one thousand, one hundred forty-eight".