7274615221 has 4 divisors (see below), whose sum is σ = 7297563852. Its totient is φ = 7251666592.

The previous prime is 7274615213. The next prime is 7274615267. The reversal of 7274615221 is 1225164727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1225164727 = 911 ⋅1344857.

It can be written as a sum of positive squares in 2 ways, for example, as 3727102500 + 3547512721 = 61050^2 + 59561^2 .

It is a cyclic number.

It is not a de Polignac number, because 7274615221 - 2³ = 7274615213 is a prime.

It is a super-2 number, since 2×7274615221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7274615321) 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, 11473840 + ... + 11474473.

It is an arithmetic number, because the mean of its divisors is an integer number (1824390963).

Almost surely, 2^7274615221 is an apocalyptic number.

It is an amenable number.

7274615221 is a deficient number, since it is larger than the sum of its proper divisors (22948631).

7274615221 is a wasteful number, since it uses less digits than its factorization.

7274615221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22948630.

The product of its digits is 47040, while the sum is 37.

The square root of 7274615221 is about 85291.3549018891. The cubic root of 7274615221 is about 1937.6262479566.

Adding to 7274615221 its reverse (1225164727), we get a palindrome (8499779948).

The spelling of 7274615221 in words is "seven billion, two hundred seventy-four million, six hundred fifteen thousand, two hundred twenty-one".