211542872741 has 4 divisors (see below), whose sum is σ = 211552816800. Its totient is φ = 211532928684.

The previous prime is 211542872731. The next prime is 211542872753. The reversal of 211542872741 is 147278245112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211542872741 - 2²² = 211538678437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211542872692 and 211542872701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211542872731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4940051 + ... + 4982688.

It is an arithmetic number, because the mean of its divisors is an integer number (52888204200).

Almost surely, 2^211542872741 is an apocalyptic number.

It is an amenable number.

211542872741 is a deficient number, since it is larger than the sum of its proper divisors (9944059).

211542872741 is an equidigital number, since it uses as much as digits as its factorization.

211542872741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9944058.

The product of its digits is 250880, while the sum is 44.

The spelling of 211542872741 in words is "two hundred eleven billion, five hundred forty-two million, eight hundred seventy-two thousand, seven hundred forty-one".