213943478 has 16 divisors (see below), whose sum is σ = 367115424. Its totient is φ = 91601280.

The previous prime is 213943459. The next prime is 213943511. The reversal of 213943478 is 874349312.

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 in 7 ways as a sum of consecutive naturals, for example, 8798 + ... + 22478.

It is an arithmetic number, because the mean of its divisors is an integer number (22944714).

Almost surely, 2^213943478 is an apocalyptic number.

213943478 is a deficient number, since it is larger than the sum of its proper divisors (153171946).

213943478 is a wasteful number, since it uses less digits than its factorization.

213943478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14807.

The product of its digits is 145152, while the sum is 41.

The square root of 213943478 is about 14626.8068285597. The cubic root of 213943478 is about 598.0897375798.

The spelling of 213943478 in words is "two hundred thirteen million, nine hundred forty-three thousand, four hundred seventy-eight".