213332420 has 48 divisors (see below), whose sum is σ = 521676288. Its totient is φ = 71760000.

The previous prime is 213332411. The next prime is 213332423. The reversal of 213332420 is 24233312.

213332420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 213332392 and 213332401.

It is not an unprimeable number, because it can be changed into a prime (213332423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6956 + ... + 21795.

It is an arithmetic number, because the mean of its divisors is an integer number (10868256).

Almost surely, 2^213332420 is an apocalyptic number.

213332420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213332420 is an abundant number, since it is smaller than the sum of its proper divisors (308343868).

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

213332420 is a wasteful number, since it uses less digits than its factorization.

213332420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28820 (or 28818 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 213332420 is about 14605.9036009416. The cubic root of 213332420 is about 597.5197801613.

Adding to 213332420 its reverse (24233312), we get a palindrome (237565732).

The spelling of 213332420 in words is "two hundred thirteen million, three hundred thirty-two thousand, four hundred twenty".