213791280 has 40 divisors (see below), whose sum is σ = 662753712. Its totient is φ = 57010944.

The previous prime is 213791213. The next prime is 213791293. The reversal of 213791280 is 82197312.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×213791280² = 91413422808076800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445159 + ... + 445638.

Almost surely, 2^213791280 is an apocalyptic number.

213791280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213791280 is an abundant number, since it is smaller than the sum of its proper divisors (448962432).

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

213791280 is a wasteful number, since it uses less digits than its factorization.

213791280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890813 (or 890807 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 213791280 is about 14621.6031952724. The cubic root of 213791280 is about 597.9478782176.

The spelling of 213791280 in words is "two hundred thirteen million, seven hundred ninety-one thousand, two hundred eighty".