7220245261 has 4 divisors (see below), whose sum is σ = 7534168992. Its totient is φ = 6906321532.

The previous prime is 7220245243. The next prime is 7220245267. The reversal of 7220245261 is 1625420227.

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 7220245261 - 2¹³ = 7220237069 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 (7220245267) 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, 156961831 + ... + 156961876.

It is an arithmetic number, because the mean of its divisors is an integer number (1883542248).

Almost surely, 2^7220245261 is an apocalyptic number.

It is an amenable number.

7220245261 is a deficient number, since it is larger than the sum of its proper divisors (313923731).

7220245261 is a wasteful number, since it uses less digits than its factorization.

7220245261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313923730.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 7220245261 is about 84972.0263439680. The cubic root of 7220245261 is about 1932.7869444442.

Adding to 7220245261 its reverse (1625420227), we get a palindrome (8845665488).

The spelling of 7220245261 in words is "seven billion, two hundred twenty million, two hundred forty-five thousand, two hundred sixty-one".