51522515 has 8 divisors (see below), whose sum is σ = 67447728. Its totient is φ = 37470880.

The previous prime is 51522511. The next prime is 51522587.

51522515 is nontrivially palindromic in base 10.

51522515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51522515 - 2² = 51522511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51522511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468332 + ... + 468441.

It is an arithmetic number, because the mean of its divisors is an integer number (8430966).

Almost surely, 2^51522515 is an apocalyptic number.

51522515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51522515 is a deficient number, since it is larger than the sum of its proper divisors (15925213).

51522515 is a wasteful number, since it uses less digits than its factorization.

51522515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936789.

The product of its digits is 2500, while the sum is 26.

The square root of 51522515 is about 7177.9185701706. The cubic root of 51522515 is about 372.1051534353.

It can be divided in two parts, 5152 and 2515, that added together give a palindrome (7667).

The spelling of 51522515 in words is "fifty-one million, five hundred twenty-two thousand, five hundred fifteen".