213955340 has 12 divisors (see below), whose sum is σ = 449306256. Its totient is φ = 85582128.

The previous prime is 213955331. The next prime is 213955351. The reversal of 213955340 is 43559312.

213955340 = 5168² + 5169² + ... + 5175².

It is a junction number, because it is equal to n+sod(n) for n = 213955297 and 213955306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5348864 + ... + 5348903.

It is an arithmetic number, because the mean of its divisors is an integer number (37442188).

Almost surely, 2^213955340 is an apocalyptic number.

213955340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213955340 is an abundant number, since it is smaller than the sum of its proper divisors (235350916).

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

213955340 is a wasteful number, since it uses less digits than its factorization.

213955340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10697776 (or 10697774 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 213955340 is about 14627.2123113053. The cubic root of 213955340 is about 598.1007909811.

The spelling of 213955340 in words is "two hundred thirteen million, nine hundred fifty-five thousand, three hundred forty".