216145448 has 48 divisors (see below), whose sum is σ = 422863740. Its totient is φ = 103534080.

The previous prime is 216145427. The next prime is 216145469. The reversal of 216145448 is 844541612.

It is an interprime number because it is at equal distance from previous prime (216145427) and next prime (216145469).

It can be written as a sum of positive squares in 6 ways, for example, as 23990404 + 192155044 = 4898^2 + 13862^2 .

It is a super-3 number, since 3×216145448³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1577636 + ... + 1577772.

Almost surely, 2^216145448 is an apocalyptic number.

It is an amenable number.

216145448 is a deficient number, since it is larger than the sum of its proper divisors (206718292).

216145448 is a wasteful number, since it uses less digits than its factorization.

216145448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 253 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The square root of 216145448 is about 14701.8858654256. The cubic root of 216145448 is about 600.1346438569.

The spelling of 216145448 in words is "two hundred sixteen million, one hundred forty-five thousand, four hundred forty-eight".