55015307 has 4 divisors (see below), whose sum is σ = 55030440. Its totient is φ = 55000176.

The previous prime is 55015277. The next prime is 55015309. The reversal of 55015307 is 70351055.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 70351055 = 5 ⋅14070211.

It is a cyclic number.

It is not a de Polignac number, because 55015307 - 2¹⁶ = 54949771 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (55015309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1544 + ... + 10602.

It is an arithmetic number, because the mean of its divisors is an integer number (13757610).

Almost surely, 2^55015307 is an apocalyptic number.

55015307 is a deficient number, since it is larger than the sum of its proper divisors (15133).

55015307 is an equidigital number, since it uses as much as digits as its factorization.

55015307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15132.

The product of its (nonzero) digits is 2625, while the sum is 26.

The square root of 55015307 is about 7417.2304130315. The cubic root of 55015307 is about 380.3305226785.

The spelling of 55015307 in words is "fifty-five million, fifteen thousand, three hundred seven".