213720070 has 8 divisors (see below), whose sum is σ = 384696144. Its totient is φ = 85488024.

The previous prime is 213720049. The next prime is 213720079. The reversal of 213720070 is 70027312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213720079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10685994 + ... + 10686013.

It is an arithmetic number, because the mean of its divisors is an integer number (48087018).

Almost surely, 2^213720070 is an apocalyptic number.

213720070 is a deficient number, since it is larger than the sum of its proper divisors (170976074).

213720070 is a wasteful number, since it uses less digits than its factorization.

213720070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21372014.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 213720070 is about 14619.1678969769. The cubic root of 213720070 is about 597.8814823122.

Adding to 213720070 its reverse (70027312), we get a palindrome (283747382).

The spelling of 213720070 in words is "two hundred thirteen million, seven hundred twenty thousand, seventy".