7222857137 has 4 divisors (see below), whose sum is σ = 7294370676. Its totient is φ = 7151343600.

The previous prime is 7222857097. The next prime is 7222857143. The reversal of 7222857137 is 7317582227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7317582227 = 23 ⋅318155749.

It can be written as a sum of positive squares in 2 ways, for example, as 5404602256 + 1818254881 = 73516^2 + 42641^2 .

It is a cyclic number.

It is not a de Polignac number, because 7222857137 - 2¹⁶ = 7222791601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7222857737) 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, 35756618 + ... + 35756819.

It is an arithmetic number, because the mean of its divisors is an integer number (1823592669).

Almost surely, 2^7222857137 is an apocalyptic number.

It is an amenable number.

7222857137 is a deficient number, since it is larger than the sum of its proper divisors (71513539).

7222857137 is a wasteful number, since it uses less digits than its factorization.

7222857137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71513538.

The product of its digits is 329280, while the sum is 44.

The square root of 7222857137 is about 84987.3939887558. The cubic root of 7222857137 is about 1933.0199739815.

The spelling of 7222857137 in words is "seven billion, two hundred twenty-two million, eight hundred fifty-seven thousand, one hundred thirty-seven".