212310400340 has 24 divisors (see below), whose sum is σ = 445940322912. Its totient is φ = 84907306400.

The previous prime is 212310400307. The next prime is 212310400363. The reversal of 212310400340 is 43004013212.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 949814 + ... + 1151853.

It is an arithmetic number, because the mean of its divisors is an integer number (18580846788).

Almost surely, 2^212310400340 is an apocalyptic number.

212310400340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212310400340 is an abundant number, since it is smaller than the sum of its proper divisors (233629922572).

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

212310400340 is a wasteful number, since it uses less digits than its factorization.

212310400340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106727 (or 2106725 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 212310400340 its reverse (43004013212), we get a palindrome (255314413552).

The spelling of 212310400340 in words is "two hundred twelve billion, three hundred ten million, four hundred thousand, three hundred forty".