55501515 has 24 divisors (see below), whose sum is σ = 101863008. Its totient is φ = 27859200.

The previous prime is 55501513. The next prime is 55501531. The reversal of 55501515 is 51510555.

It is not a de Polignac number, because 55501515 - 2¹ = 55501513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55501513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35511 + ... + 37040.

It is an arithmetic number, because the mean of its divisors is an integer number (4244292).

Almost surely, 2^55501515 is an apocalyptic number.

55501515 is a deficient number, since it is larger than the sum of its proper divisors (46361493).

55501515 is a wasteful number, since it uses less digits than its factorization.

55501515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72579 (or 72576 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 27.

The square root of 55501515 is about 7449.9338923241. The cubic root of 55501515 is about 381.4476520595.

The spelling of 55501515 in words is "fifty-five million, five hundred one thousand, five hundred fifteen".