43148801309 has 4 divisors (see below), whose sum is σ = 43459224480. Its totient is φ = 42838378140.

The previous prime is 43148801281. The next prime is 43148801321. The reversal of 43148801309 is 90310884134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43148801309 is a prime.

It is a super-2 number, since 2×43148801309² (a number of 22 digits) 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 (43148801369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155211377 + ... + 155211654.

It is an arithmetic number, because the mean of its divisors is an integer number (10864806120).

Almost surely, 2^43148801309 is an apocalyptic number.

It is an amenable number.

43148801309 is a deficient number, since it is larger than the sum of its proper divisors (310423171).

43148801309 is a wasteful number, since it uses less digits than its factorization.

43148801309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310423170.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 43148801309 in words is "forty-three billion, one hundred forty-eight million, eight hundred one thousand, three hundred nine".