55015320 has 64 divisors (see below), whose sum is σ = 170748000. Its totient is φ = 14163968.

The previous prime is 55015309. The next prime is 55015327. The reversal of 55015320 is 2351055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55015327) 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, 4425 + ... + 11384.

Almost surely, 2^55015320 is an apocalyptic number.

It is an amenable number.

55015320 is an abundant number, since it is smaller than the sum of its proper divisors (115732680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55015320 is a wasteful number, since it uses less digits than its factorization.

55015320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15852 (or 15848 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 55015320 is about 7417.2312893694. The cubic root of 55015320 is about 380.3305526356.

Adding to 55015320 its reverse (2351055), we get a palindrome (57366375).

The spelling of 55015320 in words is "fifty-five million, fifteen thousand, three hundred twenty".