5263121251 has 8 divisors (see below), whose sum is σ = 5393256624. Its totient is φ = 5133070080.

The previous prime is 5263121209. The next prime is 5263121261. The reversal of 5263121251 is 1521213625.

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

It is a cyclic number.

It is not a de Polignac number, because 5263121251 - 2⁹ = 5263120739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5263121261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116460 + ... + 155206.

It is an arithmetic number, because the mean of its divisors is an integer number (674157078).

Almost surely, 2^5263121251 is an apocalyptic number.

5263121251 is a deficient number, since it is larger than the sum of its proper divisors (130135373).

5263121251 is a wasteful number, since it uses less digits than its factorization.

5263121251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42101.

The product of its digits is 3600, while the sum is 28.

The square root of 5263121251 is about 72547.3724610340. The cubic root of 5263121251 is about 1739.4600485841.

Adding to 5263121251 its reverse (1521213625), we get a palindrome (6784334876).

The spelling of 5263121251 in words is "five billion, two hundred sixty-three million, one hundred twenty-one thousand, two hundred fifty-one".