2158214850061 has 4 divisors (see below), whose sum is σ = 2158239896512. Its totient is φ = 2158189803612.

The previous prime is 2158214850037. The next prime is 2158214850079. The reversal of 2158214850061 is 1600584128512.

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 2158214850061 - 2³¹ = 2156067366413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158214850661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12393525 + ... + 12566458.

It is an arithmetic number, because the mean of its divisors is an integer number (539559974128).

Almost surely, 2^{2158214850061} is an apocalyptic number.

It is an amenable number.

2158214850061 is a deficient number, since it is larger than the sum of its proper divisors (25046451).

2158214850061 is an equidigital number, since it uses as much as digits as its factorization.

2158214850061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25046450.

The product of its (nonzero) digits is 153600, while the sum is 43.

Adding to 2158214850061 its reverse (1600584128512), we get a palindrome (3758798978573).

The spelling of 2158214850061 in words is "two trillion, one hundred fifty-eight billion, two hundred fourteen million, eight hundred fifty thousand, sixty-one".