213312351 has 32 divisors (see below), whose sum is σ = 331273728. Its totient is φ = 119577600.

The previous prime is 213312283. The next prime is 213312361. The reversal of 213312351 is 153213312.

It is not a de Polignac number, because 213312351 - 2⁷ = 213312223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213312361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 531751 + ... + 532151.

It is an arithmetic number, because the mean of its divisors is an integer number (10352304).

Almost surely, 2^213312351 is an apocalyptic number.

213312351 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213312351 is a deficient number, since it is larger than the sum of its proper divisors (117961377).

213312351 is a wasteful number, since it uses less digits than its factorization.

213312351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831.

The product of its digits is 540, while the sum is 21.

The square root of 213312351 is about 14605.2165680622. The cubic root of 213312351 is about 597.5010425803.

Adding to 213312351 its reverse (153213312), we get a palindrome (366525663).

The spelling of 213312351 in words is "two hundred thirteen million, three hundred twelve thousand, three hundred fifty-one".