2156262032305 has 4 divisors (see below), whose sum is σ = 2587514438772. Its totient is φ = 1725009625840.

The previous prime is 2156262032299. The next prime is 2156262032347. The reversal of 2156262032305 is 5032302626512.

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 1285228075041 + 871033957264 = 1133679^2 + 933292^2 .

It is not a de Polignac number, because 2156262032305 - 2³ = 2156262032297 is a prime.

It is a super-2 number, since 2×2156262032305² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

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, 215626203226 + ... + 215626203235.

It is an arithmetic number, because the mean of its divisors is an integer number (646878609693).

Almost surely, 2^{2156262032305} is an apocalyptic number.

It is an amenable number.

2156262032305 is a deficient number, since it is larger than the sum of its proper divisors (431252406467).

2156262032305 is an equidigital number, since it uses as much as digits as its factorization.

2156262032305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431252406466.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 2156262032305 its reverse (5032302626512), we get a palindrome (7188564658817).

The spelling of 2156262032305 in words is "two trillion, one hundred fifty-six billion, two hundred sixty-two million, thirty-two thousand, three hundred five".