213220556 has 6 divisors (see below), whose sum is σ = 373135980. Its totient is φ = 106610276.

The previous prime is 213220549. The next prime is 213220561. The reversal of 213220556 is 655022312.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26652566 + ... + 26652573.

It is an arithmetic number, because the mean of its divisors is an integer number (62189330).

Almost surely, 2^213220556 is an apocalyptic number.

It is an amenable number.

213220556 is a deficient number, since it is larger than the sum of its proper divisors (159915424).

213220556 is a wasteful number, since it uses less digits than its factorization.

213220556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53305143 (or 53305141 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 213220556 is about 14602.0736883499. The cubic root of 213220556 is about 597.4153224655.

Adding to 213220556 its reverse (655022312), we get a palindrome (868242868).

The spelling of 213220556 in words is "two hundred thirteen million, two hundred twenty thousand, five hundred fifty-six".