2151266613245 has 4 divisors (see below), whose sum is σ = 2581519935900. Its totient is φ = 1721013290592.

The previous prime is 2151266613239. The next prime is 2151266613313. The reversal of 2151266613245 is 5423166621512.

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 713926983364 + 1437339629881 = 844942^2 + 1198891^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151266613245 - 2¹⁶ = 2151266547709 is a prime.

It is a super-2 number, since 2×2151266613245² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2151266613196 and 2151266613205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215126661320 + ... + 215126661329.

It is an arithmetic number, because the mean of its divisors is an integer number (645379983975).

Almost surely, 2^{2151266613245} is an apocalyptic number.

It is an amenable number.

2151266613245 is a deficient number, since it is larger than the sum of its proper divisors (430253322655).

2151266613245 is an equidigital number, since it uses as much as digits as its factorization.

2151266613245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430253322654.

The product of its digits is 518400, while the sum is 44.

The spelling of 2151266613245 in words is "two trillion, one hundred fifty-one billion, two hundred sixty-six million, six hundred thirteen thousand, two hundred forty-five".