213136456 has 32 divisors (see below), whose sum is σ = 431456760. Its totient is φ = 98122752.

The previous prime is 213136453. The next prime is 213136481. The reversal of 213136456 is 654631312.

It can be written as a sum of positive squares in 4 ways, for example, as 65124900 + 148011556 = 8070^2 + 12166^2 .

It is not an unprimeable number, because it can be changed into a prime (213136453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42666 + ... + 47398.

Almost surely, 2^213136456 is an apocalyptic number.

213136456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

213136456 is an abundant number, since it is smaller than the sum of its proper divisors (218320304).

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

213136456 is a wasteful number, since it uses less digits than its factorization.

213136456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185 (or 5181 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 213136456 is about 14599.1936763645. The cubic root of 213136456 is about 597.3367665065.

Adding to 213136456 its reverse (654631312), we get a palindrome (867767768).

The spelling of 213136456 in words is "two hundred thirteen million, one hundred thirty-six thousand, four hundred fifty-six".