52181444437 has 8 divisors (see below), whose sum is σ = 55297410840. Its totient is φ = 49153251840.

The previous prime is 52181444429. The next prime is 52181444449. The reversal of 52181444437 is 73444418125.

It can be written as a sum of positive squares in 4 ways, for example, as 1484869156 + 50696575281 = 38534^2 + 225159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52181444437 - 2³ = 52181444429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52181444393 and 52181444402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52181444407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21942228 + ... + 21944605.

It is an arithmetic number, because the mean of its divisors is an integer number (6912176355).

Almost surely, 2^52181444437 is an apocalyptic number.

It is an amenable number.

52181444437 is a deficient number, since it is larger than the sum of its proper divisors (3115966403).

52181444437 is a wasteful number, since it uses less digits than its factorization.

52181444437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43886903.

The product of its digits is 430080, while the sum is 43.

The spelling of 52181444437 in words is "fifty-two billion, one hundred eighty-one million, four hundred forty-four thousand, four hundred thirty-seven".