7225534013521 has 8 divisors (see below), whose sum is σ = 7235756167680. Its totient is φ = 7215313197792.

The previous prime is 7225534013513. The next prime is 7225534013543. The reversal of 7225534013521 is 1253104355227.

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

It is a cyclic number.

It is not a de Polignac number, because 7225534013521 - 2³ = 7225534013513 is a prime.

It is a super-2 number, since 2×7225534013521² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7225534013561) 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, 10728301 + ... + 11381893.

It is an arithmetic number, because the mean of its divisors is an integer number (904469520960).

Almost surely, 2^{7225534013521} is an apocalyptic number.

It is an amenable number.

7225534013521 is a deficient number, since it is larger than the sum of its proper divisors (10222154159).

7225534013521 is a wasteful number, since it uses less digits than its factorization.

7225534013521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669215.

The product of its (nonzero) digits is 252000, while the sum is 40.

Adding to 7225534013521 its reverse (1253104355227), we get a palindrome (8478638368748).

The spelling of 7225534013521 in words is "seven trillion, two hundred twenty-five billion, five hundred thirty-four million, thirteen thousand, five hundred twenty-one".