43091261951 has 4 divisors (see below), whose sum is σ = 43092756504. Its totient is φ = 43089767400.

The previous prime is 43091261911. The next prime is 43091261971. The reversal of 43091261951 is 15916219034.

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

It is a cyclic number.

It is not a de Polignac number, because 43091261951 - 2¹⁸ = 43090999807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43091261899 and 43091261908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43091261911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703160 + ... + 761981.

It is an arithmetic number, because the mean of its divisors is an integer number (10773189126).

Almost surely, 2^43091261951 is an apocalyptic number.

43091261951 is a deficient number, since it is larger than the sum of its proper divisors (1494553).

43091261951 is a wasteful number, since it uses less digits than its factorization.

43091261951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494552.

The product of its (nonzero) digits is 58320, while the sum is 41.

The spelling of 43091261951 in words is "forty-three billion, ninety-one million, two hundred sixty-one thousand, nine hundred fifty-one".