51550513 has 8 divisors (see below), whose sum is σ = 59339840. Its totient is φ = 43867440.

The previous prime is 51550469. The next prime is 51550517. The reversal of 51550513 is 31505515.

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 51550513 - 2¹³ = 51542321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51550517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25518 + ... + 27463.

It is an arithmetic number, because the mean of its divisors is an integer number (7417480).

Almost surely, 2^51550513 is an apocalyptic number.

It is an amenable number.

51550513 is a deficient number, since it is larger than the sum of its proper divisors (7789327).

51550513 is a wasteful number, since it uses less digits than its factorization.

51550513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53127.

The product of its (nonzero) digits is 1875, while the sum is 25.

The square root of 51550513 is about 7179.8685921123. The cubic root of 51550513 is about 372.1725434784.

It can be divided in two parts, 51 and 550513, that added together give a square (550564 = 742²).

The spelling of 51550513 in words is "fifty-one million, five hundred fifty thousand, five hundred thirteen".