5102520421 has 4 divisors (see below), whose sum is σ = 5114640844. Its totient is φ = 5090400000.

The previous prime is 5102520419. The next prime is 5102520427. The reversal of 5102520421 is 1240252015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1240252015 = 5 ⋅248050403.

It can be written as a sum of positive squares in 2 ways, for example, as 1818084321 + 3284436100 = 42639^2 + 57310^2 .

It is a cyclic number.

It is not a de Polignac number, because 5102520421 - 2¹ = 5102520419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5102520392 and 5102520401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5102520427) 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 3 ways as a sum of consecutive naturals, for example, 6059580 + ... + 6060421.

It is an arithmetic number, because the mean of its divisors is an integer number (1278660211).

Almost surely, 2^5102520421 is an apocalyptic number.

It is an amenable number.

5102520421 is a deficient number, since it is larger than the sum of its proper divisors (12120423).

5102520421 is a wasteful number, since it uses less digits than its factorization.

5102520421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12120422.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 5102520421 is about 71431.9285823923. The cubic root of 5102520421 is about 1721.5841297295.

Adding to 5102520421 its reverse (1240252015), we get a palindrome (6342772436).

The spelling of 5102520421 in words is "five billion, one hundred two million, five hundred twenty thousand, four hundred twenty-one".