43221077 has 6 divisors (see below), whose sum is σ = 43553718. Its totient is φ = 42890952.

The previous prime is 43221047. The next prime is 43221083. The reversal of 43221077 is 77012234.

It can be written as a sum of positive squares in only one way, i.e., 40883236 + 2337841 = 6394^2 + 1529^2 .

It is not a de Polignac number, because 43221077 - 2¹² = 43216981 is a prime.

It is a super-2 number, since 2×43221077² = 3736122994079858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43221047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18203 + ... + 20439.

It is an arithmetic number, because the mean of its divisors is an integer number (7258953).

Almost surely, 2^43221077 is an apocalyptic number.

It is an amenable number.

43221077 is a deficient number, since it is larger than the sum of its proper divisors (332641).

43221077 is an equidigital number, since it uses as much as digits as its factorization.

43221077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515 (or 2376 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 43221077 is about 6574.2738762543. The cubic root of 43221077 is about 350.9391836797.

The spelling of 43221077 in words is "forty-three million, two hundred twenty-one thousand, seventy-seven".