2145212243252 has 24 divisors (see below), whose sum is σ = 4047776917800. Its totient is φ = 988903610496.

The previous prime is 2145212243243. The next prime is 2145212243309. The reversal of 2145212243252 is 2523422125412.

It can be written as a sum of positive squares in 4 ways, for example, as 257044944016 + 1888167299236 = 506996^2 + 1374106^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24838727 + ... + 24924942.

It is an arithmetic number, because the mean of its divisors is an integer number (168657371575).

Almost surely, 2^{2145212243252} is an apocalyptic number.

It is an amenable number.

2145212243252 is a deficient number, since it is larger than the sum of its proper divisors (1902564674548).

2145212243252 is a wasteful number, since it uses less digits than its factorization.

2145212243252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49764515 (or 49764513 counting only the distinct ones).

The product of its digits is 76800, while the sum is 35.

Adding to 2145212243252 its reverse (2523422125412), we get a palindrome (4668634368664).

The spelling of 2145212243252 in words is "two trillion, one hundred forty-five billion, two hundred twelve million, two hundred forty-three thousand, two hundred fifty-two".