213240003400 has 24 divisors (see below), whose sum is σ = 495783008370. Its totient is φ = 85296001280.

The previous prime is 213240003367. The next prime is 213240003407. The reversal of 213240003400 is 4300042312.

It can be written as a sum of positive squares in 3 ways, for example, as 178815653956 + 34424349444 = 422866^2 + 185538^2 .

It is not an unprimeable number, because it can be changed into a prime (213240003407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 533099809 + ... + 533100208.

Almost surely, 2^213240003400 is an apocalyptic number.

213240003400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213240003400 is an abundant number, since it is smaller than the sum of its proper divisors (282543004970).

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

213240003400 is a wasteful number, since it uses less digits than its factorization.

213240003400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066200033 (or 1066200024 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 213240003400 its reverse (4300042312), we get a palindrome (217540045712).

The spelling of 213240003400 in words is "two hundred thirteen billion, two hundred forty million, three thousand, four hundred".