47007521 has 16 divisors (see below), whose sum is σ = 53611200. Its totient is φ = 40824000.

The previous prime is 47007509. The next prime is 47007523. The reversal of 47007521 is 12570074.

It is a cyclic number.

It is not a de Polignac number, because 47007521 - 2¹⁰ = 47006497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47007523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31490 + ... + 32948.

It is an arithmetic number, because the mean of its divisors is an integer number (3350700).

Almost surely, 2^47007521 is an apocalyptic number.

It is an amenable number.

47007521 is a deficient number, since it is larger than the sum of its proper divisors (6603679).

47007521 is a wasteful number, since it uses less digits than its factorization.

47007521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 47007521 is about 6856.2031037594. The cubic root of 47007521 is about 360.9018566191.

Adding to 47007521 its reverse (12570074), we get a palindrome (59577595).

It can be divided in two parts, 4700 and 7521, that added together give a palindrome (12221).

The spelling of 47007521 in words is "forty-seven million, seven thousand, five hundred twenty-one".