55512515 has 8 divisors (see below), whose sum is σ = 67609680. Its totient is φ = 43746912.

The previous prime is 55512487. The next prime is 55512517. The reversal of 55512515 is 51521555.

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-55512515 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55512517) 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, 82520 + ... + 83189.

It is an arithmetic number, because the mean of its divisors is an integer number (8451210).

Almost surely, 2^55512515 is an apocalyptic number.

55512515 is a deficient number, since it is larger than the sum of its proper divisors (12097165).

55512515 is a wasteful number, since it uses less digits than its factorization.

55512515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165781.

The product of its digits is 6250, while the sum is 29.

The square root of 55512515 is about 7450.6721173328. The cubic root of 55512515 is about 381.4728504527.

The spelling of 55512515 in words is "fifty-five million, five hundred twelve thousand, five hundred fifteen".