213400310340 has 48 divisors (see below), whose sum is σ = 682880994432. Its totient is φ = 48777213696.

The previous prime is 213400310311. The next prime is 213400310341. The reversal of 213400310340 is 43013004312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (213400310341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254047569 + ... + 254048408.

It is an arithmetic number, because the mean of its divisors is an integer number (14226687384).

Almost surely, 2^213400310340 is an apocalyptic number.

213400310340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213400310340 is an abundant number, since it is smaller than the sum of its proper divisors (469480684092).

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

213400310340 is a wasteful number, since it uses less digits than its factorization.

213400310340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508095996 (or 508095994 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 213400310340 its reverse (43013004312), we get a palindrome (256413314652).

The spelling of 213400310340 in words is "two hundred thirteen billion, four hundred million, three hundred ten thousand, three hundred forty".