211452431450 has 72 divisors (see below), whose sum is σ = 429561102684. Its totient is φ = 76968748800.

The previous prime is 211452431447. The next prime is 211452431581. The reversal of 211452431450 is 54134254112.

It can be written as a sum of positive squares in 6 ways, for example, as 45458930521 + 165993500929 = 213211^2 + 407423^2 .

It is a super-2 number, since 2×211452431450² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 100165895 + ... + 100168005.

Almost surely, 2^211452431450 is an apocalyptic number.

211452431450 is an abundant number, since it is smaller than the sum of its proper divisors (218108671234).

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

211452431450 is an equidigital number, since it uses as much as digits as its factorization.

211452431450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320 (or 2204 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 211452431450 its reverse (54134254112), we get a palindrome (265586685562).

The spelling of 211452431450 in words is "two hundred eleven billion, four hundred fifty-two million, four hundred thirty-one thousand, four hundred fifty".