213056478 has 24 divisors (see below), whose sum is σ = 488777328. Its totient is φ = 66841152.

The previous prime is 213056423. The next prime is 213056483. The reversal of 213056478 is 874650312.

213056478 is a `hidden beast` number, since 2 + 1 + 3 + 0 + 5 + 647 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347826 + ... + 348437.

It is an arithmetic number, because the mean of its divisors is an integer number (20365722).

Almost surely, 2^213056478 is an apocalyptic number.

213056478 is an abundant number, since it is smaller than the sum of its proper divisors (275720850).

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

213056478 is a wasteful number, since it uses less digits than its factorization.

213056478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696288 (or 696285 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 213056478 is about 14596.4542954787. The cubic root of 213056478 is about 597.2620416446.

The spelling of 213056478 in words is "two hundred thirteen million, fifty-six thousand, four hundred seventy-eight".