55015501 has 8 divisors (see below), whose sum is σ = 56186424. Its totient is φ = 53856000.

The previous prime is 55015487. The next prime is 55015529. The reversal of 55015501 is 10551055.

It can be written as a sum of positive squares in 4 ways, for example, as 28079401 + 26936100 = 5299^2 + 5190^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55015501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55015591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7251 + ... + 12751.

It is an arithmetic number, because the mean of its divisors is an integer number (7023303).

Almost surely, 2^55015501 is an apocalyptic number.

It is an amenable number.

55015501 is a deficient number, since it is larger than the sum of its proper divisors (1170923).

55015501 is a wasteful number, since it uses less digits than its factorization.

55015501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711.

The product of its (nonzero) digits is 625, while the sum is 22.

The square root of 55015501 is about 7417.2434906777. The cubic root of 55015501 is about 380.3309697300.

Adding to 55015501 its reverse (10551055), we get a palindrome (65566556).

The spelling of 55015501 in words is "fifty-five million, fifteen thousand, five hundred one".