213103020 has 96 divisors (see below), whose sum is σ = 664816320. Its totient is φ = 50641920.

The previous prime is 213103003. The next prime is 213103039. The reversal of 213103020 is 20301312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 213102987 and 213103005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17910 + ... + 27330.

It is an arithmetic number, because the mean of its divisors is an integer number (6925170).

Almost surely, 2^213103020 is an apocalyptic number.

213103020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213103020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332408160).

213103020 is an abundant number, since it is smaller than the sum of its proper divisors (451713300).

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

213103020 is a wasteful number, since it uses less digits than its factorization.

213103020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9475 (or 9473 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 213103020 is about 14598.0484997139. The cubic root of 213103020 is about 597.3055289338.

Adding to 213103020 its reverse (20301312), we get a palindrome (233404332).

The spelling of 213103020 in words is "two hundred thirteen million, one hundred three thousand, twenty".