47725151521 has 4 divisors (see below), whose sum is σ = 48625626132. Its totient is φ = 46824676912.

The previous prime is 47725151497. The next prime is 47725151531. The reversal of 47725151521 is 12515152774.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35660545600 + 12064605921 = 188840^2 + 109839^2 .

It is a cyclic number.

It is not a de Polignac number, because 47725151521 - 2⁵ = 47725151489 is a prime.

It is a super-2 number, since 2×47725151521² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47725151531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450237226 + ... + 450237331.

It is an arithmetic number, because the mean of its divisors is an integer number (12156406533).

Almost surely, 2^47725151521 is an apocalyptic number.

It is an amenable number.

47725151521 is a deficient number, since it is larger than the sum of its proper divisors (900474611).

47725151521 is an equidigital number, since it uses as much as digits as its factorization.

47725151521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900474610.

The product of its digits is 98000, while the sum is 40.

The spelling of 47725151521 in words is "forty-seven billion, seven hundred twenty-five million, one hundred fifty-one thousand, five hundred twenty-one".