213316540 has 12 divisors (see below), whose sum is σ = 447964776. Its totient is φ = 85326608.

The previous prime is 213316501. The next prime is 213316567. The reversal of 213316540 is 45613312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5332894 + ... + 5332933.

It is an arithmetic number, because the mean of its divisors is an integer number (37330398).

Almost surely, 2^213316540 is an apocalyptic number.

213316540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213316540 is an abundant number, since it is smaller than the sum of its proper divisors (234648236).

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

213316540 is a wasteful number, since it uses less digits than its factorization.

213316540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10665836 (or 10665834 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 213316540 is about 14605.3599750229. The cubic root of 213316540 is about 597.5049537704.

Adding to 213316540 its reverse (45613312), we get a palindrome (258929852).

The spelling of 213316540 in words is "two hundred thirteen million, three hundred sixteen thousand, five hundred forty".