47521970 has 16 divisors (see below), whose sum is σ = 90571608. Its totient is φ = 17890560.

The previous prime is 47521967. The next prime is 47522011. The reversal of 47521970 is 7912574.

It can be written as a sum of positive squares in 4 ways, for example, as 47100769 + 421201 = 6863^2 + 649^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 47521970.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139601 + ... + 139940.

Almost surely, 2^47521970 is an apocalyptic number.

47521970 is a deficient number, since it is larger than the sum of its proper divisors (43049638).

47521970 is a wasteful number, since it uses less digits than its factorization.

47521970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279565.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 47521970 is about 6893.6180631074. The cubic root of 47521970 is about 362.2136494069.

The spelling of 47521970 in words is "forty-seven million, five hundred twenty-one thousand, nine hundred seventy".