211545451434 has 16 divisors (see below), whose sum is σ = 430261935840. Its totient is φ = 69319978320.

The previous prime is 211545451417. The next prime is 211545451477. The reversal of 211545451434 is 434154545112.

It is a junction number, because it is equal to n+sod(n) for n = 211545451392 and 211545451401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298792657 + ... + 298793364.

It is an arithmetic number, because the mean of its divisors is an integer number (26891370990).

Almost surely, 2^211545451434 is an apocalyptic number.

211545451434 is an abundant number, since it is smaller than the sum of its proper divisors (218716484406).

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

211545451434 is a wasteful number, since it uses less digits than its factorization.

211545451434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597586085.

The product of its digits is 192000, while the sum is 39.

Adding to 211545451434 its reverse (434154545112), we get a palindrome (645699996546).

The spelling of 211545451434 in words is "two hundred eleven billion, five hundred forty-five million, four hundred fifty-one thousand, four hundred thirty-four".