55015811 has 8 divisors (see below), whose sum is σ = 58486800. Its totient is φ = 51602400.

The previous prime is 55015799. The next prime is 55015823. The reversal of 55015811 is 11851055.

It is an interprime number because it is at equal distance from previous prime (55015799) and next prime (55015823).

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

It is a cyclic number.

It is not a de Polignac number, because 55015811 - 2¹⁰ = 55014787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55015711) 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, 12416 + ... + 16253.

It is an arithmetic number, because the mean of its divisors is an integer number (7310850).

Almost surely, 2^55015811 is an apocalyptic number.

55015811 is a deficient number, since it is larger than the sum of its proper divisors (3470989).

55015811 is a wasteful number, since it uses less digits than its factorization.

55015811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28789.

The product of its (nonzero) digits is 1000, while the sum is 26.

The square root of 55015811 is about 7417.2643878994. The cubic root of 55015811 is about 380.3316840886.

Adding to 55015811 its reverse (11851055), we get a palindrome (66866866).

It can be divided in two parts, 550 and 15811, that added together give a palindrome (16361).

The spelling of 55015811 in words is "fifty-five million, fifteen thousand, eight hundred eleven".