43100452421 has 16 divisors (see below), whose sum is σ = 46552279536. Its totient is φ = 39668299776.

The previous prime is 43100452349. The next prime is 43100452457. The reversal of 43100452421 is 12425400134.

It can be written as a sum of positive squares in 8 ways, for example, as 5652784225 + 37447668196 = 75185^2 + 193514^2 .

It is a cyclic number.

It is not a de Polignac number, because 43100452421 - 2¹⁴ = 43100436037 is a prime.

It is a super-2 number, since 2×43100452421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43100454421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6759791 + ... + 6766163.

It is an arithmetic number, because the mean of its divisors is an integer number (2909517471).

Almost surely, 2^43100452421 is an apocalyptic number.

It is an amenable number.

43100452421 is a deficient number, since it is larger than the sum of its proper divisors (3451827115).

43100452421 is a wasteful number, since it uses less digits than its factorization.

43100452421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7832.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 43100452421 its reverse (12425400134), we get a palindrome (55525852555).

The spelling of 43100452421 in words is "forty-three billion, one hundred million, four hundred fifty-two thousand, four hundred twenty-one".