5251222011 has 16 divisors (see below), whose sum is σ = 8010342144. Its totient is φ = 2997518304.

The previous prime is 5251222007. The next prime is 5251222043. The reversal of 5251222011 is 1102221525.

It is not a de Polignac number, because 5251222011 - 2² = 5251222007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (5251222001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112140 + ... + 151913.

It is an arithmetic number, because the mean of its divisors is an integer number (500646384).

Almost surely, 2^5251222011 is an apocalyptic number.

5251222011 is a deficient number, since it is larger than the sum of its proper divisors (2759120133).

5251222011 is a wasteful number, since it uses less digits than its factorization.

5251222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265010.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 5251222011 is about 72465.3159173408. The cubic root of 5251222011 is about 1738.1481609596.

Adding to 5251222011 its reverse (1102221525), we get a palindrome (6353443536).

The spelling of 5251222011 in words is "five billion, two hundred fifty-one million, two hundred twenty-two thousand, eleven".