43216506457 has 4 divisors (see below), whose sum is σ = 43219104676. Its totient is φ = 43213908240.

The previous prime is 43216506451. The next prime is 43216506461. The reversal of 43216506457 is 75460561234.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39577521481 + 3638984976 = 198941^2 + 60324^2 .

It is a cyclic number.

It is not a de Polignac number, because 43216506457 - 2⁷ = 43216506329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43216506451) 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, 1273998 + ... + 1307479.

It is an arithmetic number, because the mean of its divisors is an integer number (10804776169).

Almost surely, 2^43216506457 is an apocalyptic number.

It is an amenable number.

43216506457 is a deficient number, since it is larger than the sum of its proper divisors (2598219).

43216506457 is a wasteful number, since it uses less digits than its factorization.

43216506457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598218.

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 43216506457 in words is "forty-three billion, two hundred sixteen million, five hundred six thousand, four hundred fifty-seven".