213151894 has 16 divisors (see below), whose sum is σ = 329072400. Its totient is φ = 103473504.

The previous prime is 213151891. The next prime is 213151901. The reversal of 213151894 is 498151312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213151891) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 34837 + ... + 40495.

It is an arithmetic number, because the mean of its divisors is an integer number (20567025).

Almost surely, 2^213151894 is an apocalyptic number.

213151894 is a deficient number, since it is larger than the sum of its proper divisors (115920506).

213151894 is a wasteful number, since it uses less digits than its factorization.

213151894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6207.

The product of its digits is 8640, while the sum is 34.

The square root of 213151894 is about 14599.7223946211. The cubic root of 213151894 is about 597.3511883509.

The spelling of 213151894 in words is "two hundred thirteen million, one hundred fifty-one thousand, eight hundred ninety-four".