47111421 has 16 divisors (see below), whose sum is σ = 71884800. Its totient is φ = 26884848.

The previous prime is 47111417. The next prime is 47111489. The reversal of 47111421 is 12411174.

It is not a de Polignac number, because 47111421 - 2² = 47111417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47111021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29440 + ... + 30998.

It is an arithmetic number, because the mean of its divisors is an integer number (4492800).

Almost surely, 2^47111421 is an apocalyptic number.

It is an amenable number.

47111421 is a deficient number, since it is larger than the sum of its proper divisors (24773379).

47111421 is a wasteful number, since it uses less digits than its factorization.

47111421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008.

The product of its digits is 224, while the sum is 21.

The square root of 47111421 is about 6863.7760015898. The cubic root of 47111421 is about 361.1675595613.

Adding to 47111421 its reverse (12411174), we get a palindrome (59522595).

The spelling of 47111421 in words is "forty-seven million, one hundred eleven thousand, four hundred twenty-one".