51522413 has 4 divisors (see below), whose sum is σ = 52494588. Its totient is φ = 50550240.

The previous prime is 51522409. The next prime is 51522439. The reversal of 51522413 is 31422515.

51522413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25989604 + 25532809 = 5098^2 + 5053^2 .

It is a cyclic number.

It is not a de Polignac number, because 51522413 - 2² = 51522409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51525413) 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 3 ways as a sum of consecutive naturals, for example, 486008 + ... + 486113.

It is an arithmetic number, because the mean of its divisors is an integer number (13123647).

Almost surely, 2^51522413 is an apocalyptic number.

51522413 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51522413 is a deficient number, since it is larger than the sum of its proper divisors (972175).

51522413 is an equidigital number, since it uses as much as digits as its factorization.

51522413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972174.

The product of its digits is 1200, while the sum is 23.

The square root of 51522413 is about 7177.9114650433. The cubic root of 51522413 is about 372.1049078808.

Adding to 51522413 its reverse (31422515), we get a palindrome (82944928).

The spelling of 51522413 in words is "fifty-one million, five hundred twenty-two thousand, four hundred thirteen".