5121252251 has 4 divisors (see below), whose sum is σ = 5259664512. Its totient is φ = 4982839992.

The previous prime is 5121252233. The next prime is 5121252287. The reversal of 5121252251 is 1522521215.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 5121252251 - 2²² = 5117057947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5121252251.

It is not an unprimeable number, because it can be changed into a prime (5121258251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69206075 + ... + 69206148.

It is an arithmetic number, because the mean of its divisors is an integer number (1314916128).

Almost surely, 2^5121252251 is an apocalyptic number.

5121252251 is a deficient number, since it is larger than the sum of its proper divisors (138412261).

5121252251 is a wasteful number, since it uses less digits than its factorization.

5121252251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138412260.

The product of its digits is 2000, while the sum is 26.

The square root of 5121252251 is about 71562.9251148945. The cubic root of 5121252251 is about 1723.6882558315.

Adding to 5121252251 its reverse (1522521215), we get a palindrome (6643773466).

The spelling of 5121252251 in words is "five billion, one hundred twenty-one million, two hundred fifty-two thousand, two hundred fifty-one".