47121512 has 8 divisors (see below), whose sum is σ = 88352850. Its totient is φ = 23560752.

The previous prime is 47121511. The next prime is 47121517. The reversal of 47121512 is 21512174.

It can be written as a sum of positive squares in only one way, i.e., 44542276 + 2579236 = 6674^2 + 1606^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×47121512² = 4440873786332288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47121511) by changing a digit.

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 as a sum of consecutive naturals, namely, 2945087 + ... + 2945102.

Almost surely, 2^47121512 is an apocalyptic number.

It is an amenable number.

47121512 is a deficient number, since it is larger than the sum of its proper divisors (41231338).

47121512 is a wasteful number, since it uses less digits than its factorization.

47121512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5890195 (or 5890191 counting only the distinct ones).

The product of its digits is 560, while the sum is 23.

The square root of 47121512 is about 6864.5110532361. The cubic root of 47121512 is about 361.1933444034.

Adding to 47121512 its reverse (21512174), we get a palindrome (68633686).

The spelling of 47121512 in words is "forty-seven million, one hundred twenty-one thousand, five hundred twelve".