47421511 has 4 divisors (see below), whose sum is σ = 49917400. Its totient is φ = 44925624.

The previous prime is 47421503. The next prime is 47421523. The reversal of 47421511 is 11512474.

47421511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11512474 = 2 ⋅5756237.

It is a cyclic number.

It is not a de Polignac number, because 47421511 - 2³ = 47421503 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 (47421541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1247916 + ... + 1247953.

It is an arithmetic number, because the mean of its divisors is an integer number (12479350).

Almost surely, 2^47421511 is an apocalyptic number.

47421511 is a deficient number, since it is larger than the sum of its proper divisors (2495889).

47421511 is a wasteful number, since it uses less digits than its factorization.

47421511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495888.

The product of its digits is 1120, while the sum is 25.

The square root of 47421511 is about 6886.3278312901. The cubic root of 47421511 is about 361.9582356710.

Adding to 47421511 its reverse (11512474), we get a palindrome (58933985).

The spelling of 47421511 in words is "forty-seven million, four hundred twenty-one thousand, five hundred eleven".