43055654621 has 6 divisors (see below), whose sum is σ = 50085149310. Its totient is φ = 36904846776.

The previous prime is 43055654581. The next prime is 43055654651. The reversal of 43055654621 is 12645655034.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 41285769721 + 1769884900 = 203189^2 + 42070^2 .

It is not a de Polignac number, because 43055654621 - 2³⁴ = 25875785437 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43055654651) 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, 439343366 + ... + 439343463.

It is an arithmetic number, because the mean of its divisors is an integer number (8347524885).

Almost surely, 2^43055654621 is an apocalyptic number.

It is an amenable number.

43055654621 is a deficient number, since it is larger than the sum of its proper divisors (7029494689).

43055654621 is an equidigital number, since it uses as much as digits as its factorization.

43055654621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878686843 (or 878686836 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 43055654621 in words is "forty-three billion, fifty-five million, six hundred fifty-four thousand, six hundred twenty-one".