211415452445 has 16 divisors (see below), whose sum is σ = 270582745968. Its totient is φ = 158021468160.

The previous prime is 211415452421. The next prime is 211415452477. The reversal of 211415452445 is 544254514112.

It can be written as a sum of positive squares in 8 ways, for example, as 2195203609 + 209220248836 = 46853^2 + 457406^2 .

It is not a de Polignac number, because 211415452445 - 2³⁴ = 194235583261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211415452399 and 211415452408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9065876 + ... + 9089165.

It is an arithmetic number, because the mean of its divisors is an integer number (16911421623).

Almost surely, 2^211415452445 is an apocalyptic number.

It is an amenable number.

211415452445 is a deficient number, since it is larger than the sum of its proper divisors (59167293523).

211415452445 is a wasteful number, since it uses less digits than its factorization.

211415452445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18155200.

The product of its digits is 128000, while the sum is 38.

Adding to 211415452445 its reverse (544254514112), we get a palindrome (755669966557).

The spelling of 211415452445 in words is "two hundred eleven billion, four hundred fifteen million, four hundred fifty-two thousand, four hundred forty-five".