2251520311 has 4 divisors (see below), whose sum is σ = 2370021400. Its totient is φ = 2133019224.

The previous prime is 2251520287. The next prime is 2251520321. The reversal of 2251520311 is 1130251522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1130251522 = 2 ⋅565125761.

It is a cyclic number.

It is not a de Polignac number, because 2251520311 - 2⁵ = 2251520279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251520321) 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, 59250516 + ... + 59250553.

It is an arithmetic number, because the mean of its divisors is an integer number (592505350).

Almost surely, 2^2251520311 is an apocalyptic number.

2251520311 is a deficient number, since it is larger than the sum of its proper divisors (118501089).

2251520311 is a wasteful number, since it uses less digits than its factorization.

2251520311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118501088.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 2251520311 is about 47450.1876813991. The cubic root of 2251520311 is about 1310.6657670976.

Adding to 2251520311 its reverse (1130251522), we get a palindrome (3381771833).

The spelling of 2251520311 in words is "two billion, two hundred fifty-one million, five hundred twenty thousand, three hundred eleven".