55515843 has 12 divisors (see below), whose sum is σ = 81289000. Its totient is φ = 36503136.

The previous prime is 55515841. The next prime is 55515847. The reversal of 55515843 is 34851555.

It is a happy number.

It is not a de Polignac number, because 55515843 - 2¹ = 55515841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55515798 and 55515807.

It is not an unprimeable number, because it can be changed into a prime (55515841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41593 + ... + 42906.

Almost surely, 2^55515843 is an apocalyptic number.

55515843 is a deficient number, since it is larger than the sum of its proper divisors (25773157).

55515843 is a wasteful number, since it uses less digits than its factorization.

55515843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84578 (or 84575 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 55515843 is about 7450.8954495416. The cubic root of 55515843 is about 381.4804734562.

The spelling of 55515843 in words is "fifty-five million, five hundred fifteen thousand, eight hundred forty-three".