215254131445 has 16 divisors (see below), whose sum is σ = 259766357760. Its totient is φ = 171229291200.

The previous prime is 215254131397. The next prime is 215254131541. The reversal of 215254131445 is 544131452512.

215254131445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-215254131445 is a prime.

It is a super-2 number, since 2×215254131445² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11519460 + ... + 11538130.

It is an arithmetic number, because the mean of its divisors is an integer number (16235397360).

Almost surely, 2^215254131445 is an apocalyptic number.

It is an amenable number.

215254131445 is a deficient number, since it is larger than the sum of its proper divisors (44512226315).

215254131445 is a wasteful number, since it uses less digits than its factorization.

215254131445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31596.

The product of its digits is 96000, while the sum is 37.

Adding to 215254131445 its reverse (544131452512), we get a palindrome (759385583957).

The spelling of 215254131445 in words is "two hundred fifteen billion, two hundred fifty-four million, one hundred thirty-one thousand, four hundred forty-five".