5100021 has 12 divisors (see below), whose sum is σ = 7400640. Its totient is φ = 3384360.

The previous prime is 5099993. The next prime is 5100071. The reversal of 5100021 is 1200015.

It is a happy number.

It is not a de Polignac number, because 5100021 - 2⁵ = 5099989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 5099976 and 5100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5100071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 966 + ... + 3336.

It is an arithmetic number, because the mean of its divisors is an integer number (616720).

Almost surely, 2^5100021 is an apocalyptic number.

It is an amenable number.

5100021 is a deficient number, since it is larger than the sum of its proper divisors (2300619).

5100021 is a wasteful number, since it uses less digits than its factorization.

5100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616 (or 2613 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 5100021 is about 2258.3226076006. The cubic root of 5100021 is about 172.1302983293.

Adding to 5100021 its reverse (1200015), we get a palindrome (6300036).

The spelling of 5100021 in words is "five million, one hundred thousand, twenty-one".