7899222253 has 8 divisors (see below), whose sum is σ = 8508028088. Its totient is φ = 7290584064.

The previous prime is 7899222229. The next prime is 7899222259. The reversal of 7899222253 is 3522229987.

It can be written as a sum of positive squares in 4 ways, for example, as 1188663529 + 6710558724 = 34477^2 + 81918^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7899222253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7899222197 and 7899222206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7899222259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66325 + ... + 142117.

It is an arithmetic number, because the mean of its divisors is an integer number (1063503511).

Almost surely, 2^7899222253 is an apocalyptic number.

It is an amenable number.

7899222253 is a deficient number, since it is larger than the sum of its proper divisors (608805835).

7899222253 is a wasteful number, since it uses less digits than its factorization.

7899222253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83823.

The product of its digits is 1088640, while the sum is 49.

The square root of 7899222253 is about 88877.5688967694. The cubic root of 7899222253 is about 1991.5663411036.

The spelling of 7899222253 in words is "seven billion, eight hundred ninety-nine million, two hundred twenty-two thousand, two hundred fifty-three".