55260321 has 16 divisors (see below), whose sum is σ = 76984320. Its totient is φ = 35217360.

The previous prime is 55260313. The next prime is 55260347. The reversal of 55260321 is 12306255.

It is not a de Polignac number, because 55260321 - 2³ = 55260313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55260291 and 55260300.

It is not an unprimeable number, because it can be changed into a prime (55260301) 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, 4140 + ... + 11298.

It is an arithmetic number, because the mean of its divisors is an integer number (4811520).

Almost surely, 2^55260321 is an apocalyptic number.

It is an amenable number.

55260321 is a deficient number, since it is larger than the sum of its proper divisors (21723999).

55260321 is a wasteful number, since it uses less digits than its factorization.

55260321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7276.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 55260321 is about 7433.7286068298. The cubic root of 55260321 is about 380.8942949089.

Adding to 55260321 its reverse (12306255), we get a palindrome (67566576).

The spelling of 55260321 in words is "fifty-five million, two hundred sixty thousand, three hundred twenty-one".