7521456731225 has 6 divisors (see below), whose sum is σ = 9326606346750. Its totient is φ = 6017165384960.

The previous prime is 7521456731213. The next prime is 7521456731251. The reversal of 7521456731225 is 5221376541257.

It can be written as a sum of positive squares in 3 ways, for example, as 236488662601 + 7284968068624 = 486301^2 + 2699068^2 .

It is not a de Polignac number, because 7521456731225 - 2²⁸ = 7521188295769 is a prime.

It is a super-2 number, since 2×7521456731225² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 150429134600 + ... + 150429134649.

It is an arithmetic number, because the mean of its divisors is an integer number (1554434391125).

Almost surely, 2^{7521456731225} is an apocalyptic number.

It is an amenable number.

7521456731225 is a deficient number, since it is larger than the sum of its proper divisors (1805149615525).

7521456731225 is a wasteful number, since it uses less digits than its factorization.

7521456731225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300858269259 (or 300858269254 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 50.

The spelling of 7521456731225 in words is "seven trillion, five hundred twenty-one billion, four hundred fifty-six million, seven hundred thirty-one thousand, two hundred twenty-five".