213955864 has 8 divisors (see below), whose sum is σ = 401167260. Its totient is φ = 106977928.

The previous prime is 213955849. The next prime is 213955879. The reversal of 213955864 is 468559312.

It is an interprime number because it is at equal distance from previous prime (213955849) and next prime (213955879).

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×213955864² = 91554223479972992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213955864.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 13372234 + ... + 13372249.

Almost surely, 2^213955864 is an apocalyptic number.

It is an amenable number.

213955864 is a deficient number, since it is larger than the sum of its proper divisors (187211396).

213955864 is a wasteful number, since it uses less digits than its factorization.

213955864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26744489 (or 26744485 counting only the distinct ones).

The product of its digits is 259200, while the sum is 43.

The square root of 213955864 is about 14627.2302231147. The cubic root of 213955864 is about 598.1012792521.

The spelling of 213955864 in words is "two hundred thirteen million, nine hundred fifty-five thousand, eight hundred sixty-four".