43137213025 has 9 divisors (see below), whose sum is σ = 53491431891. Its totient is φ = 34508939640.

The previous prime is 43137213013. The next prime is 43137213029. The reversal of 43137213025 is 52031273134.

The square root of 43137213025 is 207695.

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

It can be written as a sum of positive squares in only one way, i.e., 15529396689 + 27607816336 = 124617^2 + 166156^2 .

It is not a de Polignac number, because 43137213025 - 2¹⁹ = 43136688737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43137213029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1017706 + ... + 1059244.

Almost surely, 2^43137213025 is an apocalyptic number.

43137213025 is the 207695-th square number.

43137213025 is the 103848-th centered octagonal number.

It is an amenable number.

43137213025 is a deficient number, since it is larger than the sum of its proper divisors (10354218866).

43137213025 is an frugal number, since it uses more digits than its factorization.

43137213025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83088 (or 41544 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

Adding to 43137213025 its reverse (52031273134), we get a palindrome (95168486159).

The spelling of 43137213025 in words is "forty-three billion, one hundred thirty-seven million, two hundred thirteen thousand, twenty-five".