213640124 has 6 divisors (see below), whose sum is σ = 373870224. Its totient is φ = 106820060.

The previous prime is 213640111. The next prime is 213640157. The reversal of 213640124 is 421046312.

It is a self number, because there is not a number n which added to its sum of digits gives 213640124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26705012 + ... + 26705019.

It is an arithmetic number, because the mean of its divisors is an integer number (62311704).

Almost surely, 2^213640124 is an apocalyptic number.

It is an amenable number.

213640124 is a deficient number, since it is larger than the sum of its proper divisors (160230100).

213640124 is a wasteful number, since it uses less digits than its factorization.

213640124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53410035 (or 53410033 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 213640124 is about 14616.4333542763. The cubic root of 213640124 is about 597.8069234213.

Adding to 213640124 its reverse (421046312), we get a palindrome (634686436).

The spelling of 213640124 in words is "two hundred thirteen million, six hundred forty thousand, one hundred twenty-four".