210144424240 has 40 divisors (see below), whose sum is σ = 517326130080. Its totient is φ = 79113194496.

The previous prime is 210144424229. The next prime is 210144424241. The reversal of 210144424240 is 42424441012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×210144424240² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210144424199 and 210144424208.

It is not an unprimeable number, because it can be changed into a prime (210144424241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77257620 + ... + 77260339.

It is an arithmetic number, because the mean of its divisors is an integer number (12933153252).

Almost surely, 2^210144424240 is an apocalyptic number.

210144424240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210144424240 is an abundant number, since it is smaller than the sum of its proper divisors (307181705840).

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

210144424240 is a wasteful number, since it uses less digits than its factorization.

210144424240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154517989 (or 154517983 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 210144424240 its reverse (42424441012), we get a palindrome (252568865252).

The spelling of 210144424240 in words is "two hundred ten billion, one hundred forty-four million, four hundred twenty-four thousand, two hundred forty".