47445521 has 8 divisors (see below), whose sum is σ = 50327424. Its totient is φ = 44573760.

The previous prime is 47445493. The next prime is 47445533. The reversal of 47445521 is 12554474.

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 47445521 - 2¹⁰ = 47444497 is a prime.

It is a super-2 number, since 2×47445521² = 4502154925922882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47445121) 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, 8516 + ... + 12938.

It is an arithmetic number, because the mean of its divisors is an integer number (6290928).

Almost surely, 2^47445521 is an apocalyptic number.

It is an amenable number.

47445521 is a deficient number, since it is larger than the sum of its proper divisors (2881903).

47445521 is a wasteful number, since it uses less digits than its factorization.

47445521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071.

The product of its digits is 22400, while the sum is 32.

The square root of 47445521 is about 6888.0709200762. The cubic root of 47445521 is about 362.0193130931.

Adding to 47445521 its reverse (12554474), we get a palindrome (59999995).

The spelling of 47445521 in words is "forty-seven million, four hundred forty-five thousand, five hundred twenty-one".