47151811 has 4 divisors (see below), whose sum is σ = 53887792. Its totient is φ = 40415832.

The previous prime is 47151809. The next prime is 47151847. The reversal of 47151811 is 11815174.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47151811 - 2¹ = 47151809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47151811.

It is not an unprimeable number, because it can be changed into a prime (47151911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3367980 + ... + 3367993.

It is an arithmetic number, because the mean of its divisors is an integer number (13471948).

Almost surely, 2^47151811 is an apocalyptic number.

47151811 is a deficient number, since it is larger than the sum of its proper divisors (6735981).

47151811 is an equidigital number, since it uses as much as digits as its factorization.

47151811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6735980.

The product of its digits is 1120, while the sum is 28.

The square root of 47151811 is about 6866.7176292607. The cubic root of 47151811 is about 361.2707432524.

Adding to 47151811 its reverse (11815174), we get a palindrome (58966985).

The spelling of 47151811 in words is "forty-seven million, one hundred fifty-one thousand, eight hundred eleven".