7272221145 has 32 divisors (see below), whose sum is σ = 13321255680. Its totient is φ = 3318574080.

The previous prime is 7272221141. The next prime is 7272221161. The reversal of 7272221145 is 5411222727.

It is not a de Polignac number, because 7272221145 - 2² = 7272221141 is a prime.

It is a super-2 number, since 2×7272221145² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7272221141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1116 + ... + 120605.

It is an arithmetic number, because the mean of its divisors is an integer number (416289240).

Almost surely, 2^7272221145 is an apocalyptic number.

It is an amenable number.

7272221145 is a deficient number, since it is larger than the sum of its proper divisors (6049034535).

7272221145 is a wasteful number, since it uses less digits than its factorization.

7272221145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122305.

The product of its digits is 15680, while the sum is 33.

The square root of 7272221145 is about 85277.3190537789. The cubic root of 7272221145 is about 1937.4136670238.

The spelling of 7272221145 in words is "seven billion, two hundred seventy-two million, two hundred twenty-one thousand, one hundred forty-five".