5251021001 has 4 divisors (see below), whose sum is σ = 5251567104. Its totient is φ = 5250474900.

The previous prime is 5251020967. The next prime is 5251021031. The reversal of 5251021001 is 1001201525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5251021001 - 2¹⁴ = 5251004617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5251021031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258365 + ... + 277946.

It is an arithmetic number, because the mean of its divisors is an integer number (1312891776).

Almost surely, 2^5251021001 is an apocalyptic number.

It is an amenable number.

5251021001 is a deficient number, since it is larger than the sum of its proper divisors (546103).

5251021001 is an equidigital number, since it uses as much as digits as its factorization.

5251021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546102.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 5251021001 is about 72463.9289646925. The cubic root of 5251021001 is about 1738.1259826540.

Adding to 5251021001 its reverse (1001201525), we get a palindrome (6252222526).

The spelling of 5251021001 in words is "five billion, two hundred fifty-one million, twenty-one thousand, one".