43243405501 has 2 divisors, whose sum is σ = 43243405502. Its totient is φ = 43243405500.

The previous prime is 43243405423. The next prime is 43243405523. The reversal of 43243405501 is 10550434234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28671294276 + 14572111225 = 169326^2 + 120715^2 .

It is a cyclic number.

It is not a de Polignac number, because 43243405501 - 2²¹ = 43241308349 is a prime.

It is a super-2 number, since 2×43243405501² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43243405531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21621702750 + 21621702751.

It is an arithmetic number, because the mean of its divisors is an integer number (21621702751).

Almost surely, 2^43243405501 is an apocalyptic number.

It is an amenable number.

43243405501 is a deficient number, since it is larger than the sum of its proper divisors (1).

43243405501 is an equidigital number, since it uses as much as digits as its factorization.

43243405501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 43243405501 its reverse (10550434234), we get a palindrome (53793839735).

The spelling of 43243405501 in words is "forty-three billion, two hundred forty-three million, four hundred five thousand, five hundred one".