213603780 has 96 divisors (see below), whose sum is σ = 656377344. Its totient is φ = 51577344.

The previous prime is 213603773. The next prime is 213603781. The reversal of 213603780 is 87306312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (213603781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38757 + ... + 43923.

It is an arithmetic number, because the mean of its divisors is an integer number (6837264).

Almost surely, 2^213603780 is an apocalyptic number.

213603780 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 213603780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328188672).

213603780 is an abundant number, since it is smaller than the sum of its proper divisors (442773564).

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

213603780 is a wasteful number, since it uses less digits than its factorization.

213603780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245 (or 5243 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 213603780 is about 14615.1900432393. The cubic root of 213603780 is about 597.7730222880.

The spelling of 213603780 in words is "two hundred thirteen million, six hundred three thousand, seven hundred eighty".