43722101 has 2 divisors, whose sum is σ = 43722102. Its totient is φ = 43722100.

The previous prime is 43722061. The next prime is 43722139. The reversal of 43722101 is 10122734.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22800625 + 20921476 = 4775^2 + 4574^2 .

It is a cyclic number.

It is not a de Polignac number, because 43722101 - 2⁶ = 43722037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43722901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21861050 + 21861051.

It is an arithmetic number, because the mean of its divisors is an integer number (21861051).

Almost surely, 2^43722101 is an apocalyptic number.

It is an amenable number.

43722101 is a deficient number, since it is larger than the sum of its proper divisors (1).

43722101 is an equidigital number, since it uses as much as digits as its factorization.

43722101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 43722101 is about 6612.2689751703. The cubic root of 43722101 is about 352.2900206433.

Adding to 43722101 its reverse (10122734), we get a palindrome (53844835).

The spelling of 43722101 in words is "forty-three million, seven hundred twenty-two thousand, one hundred one".