55731637 has 6 divisors (see below), whose sum is σ = 60348642. Its totient is φ = 51444432.

The previous prime is 55731623. The next prime is 55731647. The reversal of 55731637 is 73613755.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5803281 + 49928356 = 2409^2 + 7066^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55731637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55731596 and 55731605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55731647) 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, 164718 + ... + 165055.

It is an arithmetic number, because the mean of its divisors is an integer number (10058107).

Almost surely, 2^55731637 is an apocalyptic number.

It is an amenable number.

55731637 is a deficient number, since it is larger than the sum of its proper divisors (4617005).

55731637 is a wasteful number, since it uses less digits than its factorization.

55731637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329799 (or 329786 counting only the distinct ones).

The product of its digits is 66150, while the sum is 37.

The square root of 55731637 is about 7465.3624828269. The cubic root of 55731637 is about 381.9741149095.

The spelling of 55731637 in words is "fifty-five million, seven hundred thirty-one thousand, six hundred thirty-seven".