213700340 has 24 divisors (see below), whose sum is σ = 512881152. Its totient is φ = 73268640.

The previous prime is 213700339. The next prime is 213700351. The reversal of 213700340 is 43007312.

It is a super-2 number, since 2×213700340² = 91335670632231200, which contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763076 + ... + 763355.

It is an arithmetic number, because the mean of its divisors is an integer number (21370048).

Almost surely, 2^213700340 is an apocalyptic number.

213700340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213700340 is an abundant number, since it is smaller than the sum of its proper divisors (299180812).

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

213700340 is a wasteful number, since it uses less digits than its factorization.

213700340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526447 (or 1526445 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 213700340 is about 14618.4930823940. The cubic root of 213700340 is about 597.8630835338.

Adding to 213700340 its reverse (43007312), we get a palindrome (256707652).

The spelling of 213700340 in words is "two hundred thirteen million, seven hundred thousand, three hundred forty".