213113451 has 16 divisors (see below), whose sum is σ = 292404224. Its totient is φ = 137964384.

The previous prime is 213113447. The next prime is 213113473. The reversal of 213113451 is 154311312.

It is not a de Polignac number, because 213113451 - 2² = 213113447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213113441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65796 + ... + 68958.

It is an arithmetic number, because the mean of its divisors is an integer number (18275264).

Almost surely, 2^213113451 is an apocalyptic number.

213113451 is a deficient number, since it is larger than the sum of its proper divisors (79290773).

213113451 is a wasteful number, since it uses less digits than its factorization.

213113451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3810.

The product of its digits is 360, while the sum is 21.

The square root of 213113451 is about 14598.4057691242. The cubic root of 213113451 is about 597.3152744430.

Adding to 213113451 its reverse (154311312), we get a palindrome (367424763).

The spelling of 213113451 in words is "two hundred thirteen million, one hundred thirteen thousand, four hundred fifty-one".