2148502213729 has 3 divisors (see below), whose sum is σ = 2148503679507. Its totient is φ = 2148500747952.

The previous prime is 2148502213709. The next prime is 2148502213789. The reversal of 2148502213729 is 9273122058412.

It is a happy number.

The square root of 2148502213729 is 1465777.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2124554032225 + 23948181504 = 1457585^2 + 154752^2 .

It is not a de Polignac number, because 2148502213729 - 2²⁷ = 2148367996001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2148502213709) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 732889 + ... + 2198665.

It is an arithmetic number, because the mean of its divisors is an integer number (716167893169).

Almost surely, 2^{2148502213729} is an apocalyptic number.

2148502213729 is the 1465777-th square number.

2148502213729 is the 732889-th centered octagonal number.

It is an amenable number.

2148502213729 is a deficient number, since it is larger than the sum of its proper divisors (1465778).

2148502213729 is an frugal number, since it uses more digits than its factorization.

2148502213729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931554 (or 1465777 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 2148502213729 in words is "two trillion, one hundred forty-eight billion, five hundred two million, two hundred thirteen thousand, seven hundred twenty-nine".