2145302149225 has 27 divisors (see below), whose sum is σ = 2670173981391. Its totient is φ = 1709814681600.

The previous prime is 2145302149223. The next prime is 2145302149271. The reversal of 2145302149225 is 5229412035412.

It is a happy number.

The square root of 2145302149225 is 1464685.

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

It can be written as a sum of positive squares in 13 ways, for example, as 5412986329 + 2139889162896 = 73573^2 + 1462836^2 .

It is not a de Polignac number, because 2145302149225 - 2¹ = 2145302149223 is a prime.

It is a super-2 number, since 2×2145302149225² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145302149223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3346804905 + ... + 3346805545.

Almost surely, 2^{2145302149225} is an apocalyptic number.

2145302149225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2145302149225 is the 1464685-th square number.

2145302149225 is the 732343-rd centered octagonal number.

It is an amenable number.

2145302149225 is a deficient number, since it is larger than the sum of its proper divisors (524871832166).

2145302149225 is an frugal number, since it uses more digits than its factorization.

2145302149225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206 (or 1103 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 2145302149225 in words is "two trillion, one hundred forty-five billion, three hundred two million, one hundred forty-nine thousand, two hundred twenty-five".