214155240 has 64 divisors (see below), whose sum is σ = 691891200. Its totient is φ = 52714752.

The previous prime is 214155229. The next prime is 214155247. The reversal of 214155240 is 42551412.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 214155240.

It is not an unprimeable number, because it can be changed into a prime (214155247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67080 + ... + 70199.

It is an arithmetic number, because the mean of its divisors is an integer number (10810800).

Almost surely, 2^214155240 is an apocalyptic number.

214155240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

214155240 is an abundant number, since it is smaller than the sum of its proper divisors (477735960).

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

214155240 is a wasteful number, since it uses less digits than its factorization.

214155240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137306 (or 137302 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 214155240 is about 14634.0438703729. The cubic root of 214155240 is about 598.2870029449.

The spelling of 214155240 in words is "two hundred fourteen million, one hundred fifty-five thousand, two hundred forty".