215143525454 has 16 divisors (see below), whose sum is σ = 379134045360. Its totient is φ = 90270010560.

The previous prime is 215143525397. The next prime is 215143525459. The reversal of 215143525454 is 454525341512.

It is a happy number.

215143525454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×215143525454² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215143525459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376124759 + ... + 376125330.

It is an arithmetic number, because the mean of its divisors is an integer number (23695877835).

Almost surely, 2^215143525454 is an apocalyptic number.

215143525454 is a deficient number, since it is larger than the sum of its proper divisors (163990519906).

215143525454 is a wasteful number, since it uses less digits than its factorization.

215143525454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752250115.

The product of its digits is 480000, while the sum is 41.

Adding to 215143525454 its reverse (454525341512), we get a palindrome (669668866966).

The spelling of 215143525454 in words is "two hundred fifteen billion, one hundred forty-three million, five hundred twenty-five thousand, four hundred fifty-four".