55986513 has 16 divisors (see below), whose sum is σ = 83637696. Its totient is φ = 33013440.

The previous prime is 55986499. The next prime is 55986517. The reversal of 55986513 is 31568955.

It is not a de Polignac number, because 55986513 - 2⁵ = 55986481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55986517) 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, 21706 + ... + 24147.

It is an arithmetic number, because the mean of its divisors is an integer number (5227356).

Almost surely, 2^55986513 is an apocalyptic number.

It is an amenable number.

55986513 is a deficient number, since it is larger than the sum of its proper divisors (27651183).

55986513 is a wasteful number, since it uses less digits than its factorization.

55986513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45904.

The product of its digits is 162000, while the sum is 42.

The square root of 55986513 is about 7482.4135811916. The cubic root of 55986513 is about 382.5555201565. Note that the first 4 decimals are identical.

The spelling of 55986513 in words is "fifty-five million, nine hundred eighty-six thousand, five hundred thirteen".