212510403240 has 64 divisors (see below), whose sum is σ = 638030131200. Its totient is φ = 56625092352.

The previous prime is 212510403229. The next prime is 212510403251. The reversal of 212510403240 is 42304015212.

212510403240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212510403229) and next prime (212510403251).

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 212510403240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538827 + ... + 845786.

It is an arithmetic number, because the mean of its divisors is an integer number (9969220800).

Almost surely, 2^212510403240 is an apocalyptic number.

212510403240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212510403240 is an abundant number, since it is smaller than the sum of its proper divisors (425519727960).

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

212510403240 is a wasteful number, since it uses less digits than its factorization.

212510403240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385906 (or 1385902 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 212510403240 its reverse (42304015212), we get a palindrome (254814418452).

The spelling of 212510403240 in words is "two hundred twelve billion, five hundred ten million, four hundred three thousand, two hundred forty".