47135221 has 16 divisors (see below), whose sum is σ = 55876608. Its totient is φ = 38908800.

The previous prime is 47135213. The next prime is 47135233. The reversal of 47135221 is 12253174.

47135221 = T₄₃₃ + T₄₃₄ + ... + T₇₁₃.

It is a happy number.

It is not a de Polignac number, because 47135221 - 2³ = 47135213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47135251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60591 + ... + 61363.

It is an arithmetic number, because the mean of its divisors is an integer number (3492288).

Almost surely, 2^47135221 is an apocalyptic number.

It is an amenable number.

47135221 is a deficient number, since it is larger than the sum of its proper divisors (8741387).

47135221 is a wasteful number, since it uses less digits than its factorization.

47135221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092.

The product of its digits is 1680, while the sum is 25.

The square root of 47135221 is about 6865.5095222423. The cubic root of 47135221 is about 361.2283681767.

Adding to 47135221 its reverse (12253174), we get a palindrome (59388395).

The spelling of 47135221 in words is "forty-seven million, one hundred thirty-five thousand, two hundred twenty-one".