216154560 has 56 divisors (see below), whose sum is σ = 686293776. Its totient is φ = 57640960.

The previous prime is 216154553. The next prime is 216154571. The reversal of 216154560 is 65451612.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 111621 + ... + 113540.

It is an arithmetic number, because the mean of its divisors is an integer number (12255246).

Almost surely, 2^216154560 is an apocalyptic number.

216154560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216154560 is an abundant number, since it is smaller than the sum of its proper divisors (470139216).

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

216154560 is a wasteful number, since it uses less digits than its factorization.

216154560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225181 (or 225171 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 216154560 is about 14702.1957543763. The cubic root of 216154560 is about 600.1430769900.

The spelling of 216154560 in words is "two hundred sixteen million, one hundred fifty-four thousand, five hundred sixty".