55215043 has 16 divisors (see below), whose sum is σ = 61951680. Its totient is φ = 48859776.

The previous prime is 55215037. The next prime is 55215047. The reversal of 55215043 is 34051255.

It is a cyclic number.

It is not a de Polignac number, because 55215043 - 2⁵ = 55215011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55214999 and 55215017.

It is not an unprimeable number, because it can be changed into a prime (55215047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62521 + ... + 63397.

It is an arithmetic number, because the mean of its divisors is an integer number (3871980).

Almost surely, 2^55215043 is an apocalyptic number.

55215043 is a deficient number, since it is larger than the sum of its proper divisors (6736637).

55215043 is a wasteful number, since it uses less digits than its factorization.

55215043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 55215043 is about 7430.6825393096. The cubic root of 55215043 is about 380.7902368556.

Adding to 55215043 its reverse (34051255), we get a palindrome (89266298).

The spelling of 55215043 in words is "fifty-five million, two hundred fifteen thousand, forty-three".