213730670 has 16 divisors (see below), whose sum is σ = 390458448. Its totient is φ = 84216000.

The previous prime is 213730669. The next prime is 213730679. The reversal of 213730670 is 76037312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213730679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158831 + ... + 160170.

It is an arithmetic number, because the mean of its divisors is an integer number (24403653).

Almost surely, 2^213730670 is an apocalyptic number.

213730670 is a deficient number, since it is larger than the sum of its proper divisors (176727778).

213730670 is a wasteful number, since it uses less digits than its factorization.

213730670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319075.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 213730670 is about 14619.5304302156. The cubic root of 213730670 is about 597.8913666420.

Adding to 213730670 its reverse (76037312), we get a palindrome (289767982).

The spelling of 213730670 in words is "two hundred thirteen million, seven hundred thirty thousand, six hundred seventy".