213909512 has 16 divisors (see below), whose sum is σ = 402501840. Its totient is φ = 106575696.

The previous prime is 213909511. The next prime is 213909547. The reversal of 213909512 is 215909312.

It is a super-4 number, since 4×213909512⁴ (a number of 34 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (213909511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44978 + ... + 49505.

It is an arithmetic number, because the mean of its divisors is an integer number (25156365).

Almost surely, 2^213909512 is an apocalyptic number.

It is an amenable number.

213909512 is a deficient number, since it is larger than the sum of its proper divisors (188592328).

213909512 is a wasteful number, since it uses less digits than its factorization.

213909512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94772 (or 94768 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 213909512 is about 14625.6456951480. The cubic root of 213909512 is about 598.0580846851.

The spelling of 213909512 in words is "two hundred thirteen million, nine hundred nine thousand, five hundred twelve".