211425405545 has 4 divisors (see below), whose sum is σ = 253710486660. Its totient is φ = 169140324432.

The previous prime is 211425405539. The next prime is 211425405557. The reversal of 211425405545 is 545504524112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24058491664 + 187366913881 = 155108^2 + 432859^2 .

It is a cyclic number.

It is not a de Polignac number, because 211425405545 - 2⁶ = 211425405481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211425405499 and 211425405508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21142540550 + ... + 21142540559.

It is an arithmetic number, because the mean of its divisors is an integer number (63427621665).

Almost surely, 2^211425405545 is an apocalyptic number.

It is an amenable number.

211425405545 is a deficient number, since it is larger than the sum of its proper divisors (42285081115).

211425405545 is an equidigital number, since it uses as much as digits as its factorization.

211425405545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42285081114.

The product of its (nonzero) digits is 160000, while the sum is 38.

Adding to 211425405545 its reverse (545504524112), we get a palindrome (756929929657).

The spelling of 211425405545 in words is "two hundred eleven billion, four hundred twenty-five million, four hundred five thousand, five hundred forty-five".