213151318 has 4 divisors (see below), whose sum is σ = 319726980. Its totient is φ = 106575658.

The previous prime is 213151303. The next prime is 213151331. The reversal of 213151318 is 813151312.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 213151292 and 213151301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53287828 + ... + 53287831.

It is an arithmetic number, because the mean of its divisors is an integer number (79931745).

Almost surely, 2^213151318 is an apocalyptic number.

213151318 is a deficient number, since it is larger than the sum of its proper divisors (106575662).

213151318 is a wasteful number, since it uses less digits than its factorization.

213151318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106575661.

The product of its digits is 720, while the sum is 25.

The square root of 213151318 is about 14599.7026682053. The cubic root of 213151318 is about 597.3506502767.

The spelling of 213151318 in words is "two hundred thirteen million, one hundred fifty-one thousand, three hundred eighteen".