213145912 has 16 divisors (see below), whose sum is σ = 456741360. Its totient is φ = 91348224.

The previous prime is 213145901. The next prime is 213145927. The reversal of 213145912 is 219541312.

213145912 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1903033 + ... + 1903144.

It is an arithmetic number, because the mean of its divisors is an integer number (28546335).

Almost surely, 2^213145912 is an apocalyptic number.

It is an amenable number.

213145912 is an abundant number, since it is smaller than the sum of its proper divisors (243595448).

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

213145912 is a wasteful number, since it uses less digits than its factorization.

213145912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3806190 (or 3806186 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 213145912 is about 14599.5175262746. The cubic root of 213145912 is about 597.3456001790.

The spelling of 213145912 in words is "two hundred thirteen million, one hundred forty-five thousand, nine hundred twelve".