43420551061 has 4 divisors (see below), whose sum is σ = 43423877952. Its totient is φ = 43417224172.

The previous prime is 43420551043. The next prime is 43420551067. The reversal of 43420551061 is 16015502434.

It is a happy number.

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 not a de Polignac number, because 43420551061 - 2⁵ = 43420551029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43420551067) 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, 1643791 + ... + 1669996.

It is an arithmetic number, because the mean of its divisors is an integer number (10855969488).

Almost surely, 2^43420551061 is an apocalyptic number.

It is an amenable number.

43420551061 is a deficient number, since it is larger than the sum of its proper divisors (3326891).

43420551061 is a wasteful number, since it uses less digits than its factorization.

43420551061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326890.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 43420551061 in words is "forty-three billion, four hundred twenty million, five hundred fifty-one thousand, sixty-one".